Walter L Robertson

US Patent:

6419981, Jul 16, 2002

Filed:

Jul 20, 2000

Appl. No.:

09/620524

Inventors:

Bruce E. Novich - Pittsburgh PA
Kami Lammon-Hilinski - Pittsburgh PA
Walter J. Robertson - Pittsburgh PA
Xiang Wu - Littleton CO
Vedagiri Velpari - Monroeville PA
Ernest L. Lawton - Clemmons NC
William B. Rice - Clemmons NC

Assignee:

PPG Industries Ohio, Inc. - Cleveland OH

International Classification:

B05D 302

US Classification:

427180, 427195, 4273898

Abstract:

Methods for inhibiting abrasive wear of a fiber strand comprising at least one glass fiber by sliding contact with surface asperities of a solid object, comprising (a) applying a composition to at least a portion of a surface of at least one glass fiber of a glass fiber strand; (b) at least partially drying the composition to form a sized glass fiber strand having a residue of the composition upon at least a portion of the surface of the at least one class fiber; and (c) sliding at least a portion of the glass fiber strand to contact surface asperities of a solid object, the surface asperities having a hardness value which is greater than a hardness value of the at least one glass fiber, such that abrasive wear of the at least one glass fiber of the glass fiber strand by contact with the surface asperities of the solid object is inhibited by the inorganic solid lubricant particles.

US Patent:

20020058140, May 16, 2002

Filed:

Feb 15, 2001

Appl. No.:

09/783539

Inventors:

David Dana - Pittsburgh PA, US
Langqiu Xu - Sewickley PA, US
Ernest Lawton - Clemmons NC, US
Vedagiri Velpari - Monroeville PA, US
Walter Robertson - Pittsburgh PA, US
William Rice - Clemmons NC, US
Kami Lammon-Hilinski - Pittsburgh PA, US
Xiang Wu - Littleton CO, US
Bruce Novich - Barrington RI, US

International Classification:

B32B003/00
D02G003/00

US Classification:

428/375000, 428/313300

Abstract:

The present invention provides an at least partially coated fiber strand comprising a plurality of fibers having a resin compatible coating composition on at least a portion of a surface of at least one of the fibers, the resin compatible coating composition comprising: (a) a plurality of discrete particles comprising a silicate having a high affinity for metal ions; and (b) at least one film-forming material.

US Patent:

20020193027, Dec 19, 2002

Filed:

Feb 28, 2001

Appl. No.:

09/795621

Inventors:

David Dana - Pittsburgh PA, US
Vedagiri Velpari - Monroeville PA, US
Kami Lammon-Hilinski - Pittsburgh PA, US
Ernest Lawton - Clemmons NC, US
Bruce Novich - Barrington RI, US
William Rice - Clemmons NC, US
Walter Robertson - Pittsburgh PA, US
Xiang Wu - Littleton CO, US

International Classification:

B32B017/02
D04H001/74

US Classification:

442/285000, 442/180000, 442/417000, 442/367000

Abstract:

The present invention provides a fabric comprising fiber strands having a coating that is more soluble in a resin matrix material than conventional slashing and/or silane finishes. As a result, the coating does not have to be removed prior to combining the coated fiber strand with a resin matrix material. These fabrics can be used in a wide variety of applications, such as reinforcements for composites, such as printed circuit boards. One nonlimiting embodiment of the invention provides a fabric comprising at least one fiber strand comprising a plurality of fibers and having a resin compatible coating composition on at least a surface of the at least one fiber strand, wherein the fabric has an LOI extracted of at least 30 percent as determined after (a) soaking the fabric in acetone for 5 minutes at about 25 C., (b) drying the fabric in an oven at 130 C. for 45 minutes to remove the acetone, and (c) heating the fabric to 675 C. for 30 minutes to burn off any remaining coating composition on the at least one fiber strand. Another nonlimiting embodiment of the present invention provides laminate comprising: a) at least one matrix material; and b) at least one fabric comprising at least one fiber strand comprising a plurality of fibers and having a resin compatible coating composition on at least a surface of the at least one fiber strand, wherein the fabric has an LOI extracted of at least 30 percent as determined after (a) soaking the fabric in acetone for 5 minutes at 25 C., (b) drying the fabric in an oven at 130 C. for 45 minutes to remove the acetone, and (c) heating the fabric to 675 C. for 30 minutes to burn off any remaining coating composition on the at least one fiber strand. The present invetion also provides an electgronic support comprising this laminate.

US Patent:

20120285984, Nov 15, 2012

Filed:

May 10, 2011

Appl. No.:

13/104043

Inventors:

Walter James Robertson - Pittsburgh PA, US
Melanie Sue Campbell - Sarver PA, US
Richard J. Foukes - Mars PA, US

International Classification:

B65D 83/00

US Classification:

222 1, 222394

Abstract:

Systems for delivering coating compositions are disclosed. The system may include a support base for supporting a container of a coating composition and a pressure canister movable in relation to the support base from an open position to a closed position in which the pressure canister surrounds the coating composition container and forms a seal with the support base. The system may include a pressure canister that is movable from a delivery position in which the canister is pressurized to a cleaning position in which the canister may be cleaned by a cleaning fixture. The pressure canisters are useful in automated systems for delivering various types of coating formulations.

US Patent:

62315331, May 15, 2001

Filed:

May 21, 1999

Appl. No.:

9/316524

Inventors:

Bruce E. Novich - Pittsburgh PA
Walter J. Robertson - Pittsburgh PA

Assignee:

PPG Industries Ohio, Inc. - Cleveland OH

International Classification:

A61F 500

US Classification:

602 7

Abstract:

One aspect of the present invention is an orthopedic splint for temporarily supporting an injured body limb, comprising: a non-woven mat at least partially impregnated with a curable resin matrix material; a first resin impermeable layer extending along at least a portion of at least one major surface of the mat; a second resin impermeable layer extending along at least along a portion of an opposing major surface of the mat; and a curing agent permeable cover surrounding the mat and the first and second resin impermeable layers. In one particular embodiment of the invention, the resin matrix material comprises a moisture curable, ambient air dried resin matrix material, the mat comprises a needled mat comprising randomly oriented continuous glass fibers and having a weight, prior to resin impregnation, of between about 0. 15 to about 2. 44 kilograms per square meter, the first resin impermeable layer is a heat insulating layer, and the cover is a water permeable cover.

US Patent:

48426202, Jun 27, 1989

Filed:

Dec 1, 1987

Appl. No.:

7/127150

Inventors:

Joseph J. Hammel - Pittsburgh PA
Walter J. Robertson - Aspinwall PA
William P. Marshall - Pittsburgh PA
Herbert W. Barch - Natrona Heights PA
Balbhadra Daas - Allison Park PA
Michael A. Smoot - Oakmont PA
Richard P. Beaver - Library PA

Assignee:

PPG Industries, Inc. - Pittsburgh PA

International Classification:

B01D 5322

US Classification:

55 16

Abstract:

A hollow, porous, silica-rich fiber, a process for producing same, and a process for enriching at least one gas from a gaseous mixture utilizing at least one fiber to result in gas separations with good permeability and good selectivity. The fiber is non-crystalline and has pore sizes having a range of 1 to around 50 Angstroms in diameter and a mean pore size of around less than 20 Angstroms in diameter and a filament diameter in the range of 1 to around 250 microns and a wall thickness in the range of around 1 to 50 microns. The fibers with a fine pore structure and thin walls are produced by forming hollow glass fibers hindered or fully phase-separable boron and/or alkali metal glass composition, by attenuation from melt at speeds in the range of 500 ft/min to around 30,000 ft/min. The phase-separable glass fibers are heat treated to yield limited phase-separated hollow glass fibers and these fibers are leached to extract acid and/or water soluble components. For fully phase-separable, hollow glass fibers, a limited heat treatment is used before leaching, where the heat treatment is at a temperature of around 300 to less than 480. degree. C.

US Patent:

49333070, Jun 12, 1990

Filed:

Apr 21, 1988

Appl. No.:

7/184304

Inventors:

William P. Marshall - Pittsburgh PA
Joseph J. Hammel - Pittsburgh PA
Herbert W. Barch - Natrona Heights PA
Roy D. Hegedus - Millvale PA
Walter J. Robertson - Aspinwall PA

Assignee:

PPG Industries, Inc. - Pittsburgh PA

International Classification:

C03C 1100
C03C 1200
C03C 1302

US Classification:

501 39

Abstract:

Porous, silica-rich shapes have improved strength and abrasion resistance by leaching the precursor glass shape in preconditioned acid having silica ion and at least one common ion that is also present in the precursor glass shape. The precursor glass shapes have shapes such as fibers, hollow fibers, tubes, rods, beads, hollow spheres and plates and compositions having 30-75 volume percent silica and at least 10-65 volume percent nonsiliceous acid extractable components. Preconditioning of the acid solution results from a pretreatment of the acid with compounds that dissociate into the ions when added to the acid solution or with shapes, particles or fragments of glass compositions different from or similar to the glass shape to be leached so long as the glass composition has extractable material to provide the silica ion and at least one common ion.

US Patent:

20210237010, Aug 5, 2021

Filed:

Apr 19, 2021

Appl. No.:

17/233826

Inventors:

- Cleveland OH, US
Walter J. Robertson - Pittsburgh PA, US
Mary Kimbro - Richfield OH, US
Nathan L. Goodnow - Harmony PA, US

Assignee:

PPG Industries Ohio, Inc. - Cleveland OH

International Classification:

B01F 13/10
B05C 9/14
B05D 5/00

Abstract:

Systems for producing, applying and evaluating coating compositions are disclosed. An automatic color matching system includes an automatic coating component dispenser, a container, a mixer for mixing the components of the coating composition and a solvent, an automatic pressurization station to apply pressure to the mixed coating composition, and a robotic arm to transport the container to and from the mixer. A coating composition dispensing system includes a computer to provide a target formulation for a coating composition, an automated component dispenser containing the components of the coating composition, a container positionable adjacent to the component dispenser to receive the components of the coating composition, and an automated component sensor to measure the amounts of each of the components dispensed into the container. The computer is programmed to store data corresponding to the measured amounts of each of the components, and amounts of components contained in the coating compositions may be monitored, along with processing parameters when the coating compositions are applied to various substrates. The characteristics of a produced sample coating may be compared with the characteristics of a target or reference coating to determine if they are sufficiently matched.