Ronald S Finkelstein

US Patent:

6422734, Jul 23, 2002

Filed:

Oct 27, 1999

Appl. No.:

09/427982

Inventors:

Gopalakrishnan Sethuraman - East Amherst NY
Ronald S. Finkelstein - East Amherst NY
Larry W. Kingston - North Tonawanda NY
Robert C. Mitchell - Youngstown NY
W. Roy Burke - Tonawanda NY

Assignee:

National Gypsum Properties, LLC - Charlotte NC

International Classification:

B01F 506

US Classification:

366101, 106677, 261DIG 26, 366340, 516 10, 516 14

Abstract:

A static foam generating apparatus including a pipe having an inner diameter, an axis, an input end, and an output end is disclosed. A plurality of perforated discs are disposed in the pipe, the discs positioned parallel to each other and perpendicular to the pipe axis. A plurality of spacer rings are disposed within the pipe, a spacer ring separating each perforated disc from each adjacent perforated disc. Additionally, a method for generating foam including the steps of providing a static foam generating apparatus including a pipe having an inner diameter, an axis, an input end, and an output end, supplying feed water to the pipe, supplying surfactant to the pipe, and supplying air to the pipe is disclosed.

US Patent:

6652825, Nov 25, 2003

Filed:

May 1, 2001

Appl. No.:

09/846728

Inventors:

Gopalakrishnan Sethuraman - East Amherst NY
Claudette Brown - Lackawanna NY
Ronald S. Finkelstein - East Amherst NY

Assignee:

National Gypsum Properties LLC - Charlotte NC

International Classification:

C01B 1796

US Classification:

423555, 20415715, 20415743, 20415749, 2041575

Abstract:

A method of producing calcium sulfate -hemihydrate is disclosed, including the steps of exposing a mixture including a calcium sulfate form selected from the group consisting of calcium sulfate dihydrate, calcium sulfate -hemihydrate, water-soluble calcium sulfate anhydrite, and mixtures thereof, water, and a crystallization catalyst, to microwave radiation to produce calcium sulfate -hemihydrate; and separating at least a portion of the calcium sulfate -hemihydrate to provide a solid comprising calcium sulfate -hemihydrate and a filtrate and/or remainder that can be recycled to provide at least one of a calcium sulfate form, water, a crystallization catalyst, a crystal habit modifier, and a surfactant for use in production of additional -hemihydrate.

US Patent:

62003801, Mar 13, 2001

Filed:

Feb 16, 1999

Appl. No.:

9/249886

Inventors:

Ronald S. Finkelstein - East Amherst NY
Jashbhai M. Patel - Amherst NY

Assignee:

National Gypsum Company - Charlotte NC

International Classification:

C04B 2800
C04B 700
C04B 1100

US Classification:

106783

Abstract:

A method of continuously producing a cementitious composition such as joint compound includes pre-mixing at least two dry ingredients and pre-mixing at least two liquid ingredients. The ingredients are provided in a continuous mixing apparatus and at least substantially continuously blended.

US Patent:

57187592, Feb 17, 1998

Filed:

Oct 18, 1996

Appl. No.:

8/731873

Inventors:

Elisha Stav - Amherst NY
Edward A. Burkard - East Amherst NY
Ronald S. Finkelstein - East Amherst NY

Assignee:

National Gypsum Company - Charlotte NC

International Classification:

C04B 704
C04B 1128
C09D 106
C09D 518

US Classification:

106735

Abstract:

A cementitious composition useful for water-resistant construction materials, including floor underlayments, backing boards, self-leveling floor materials, road patching materials, fiberboard, fire-proofing sprays, and fire-stopping materials includes about 20 wt. % to about 75 wt. % calcium sulfate beta-hemihydrate, about 10 wt. % to about 50 wt. % Portland cement, about 4 wt. % to about 20 wt. % silica fume and about 1 wt. % to about 50 wt. % pozzolanic aggregate. The Portland cement component may also be a blend of Portland cement with fly ash and/or ground blast slag.

US Patent:

58794468, Mar 9, 1999

Filed:

Aug 21, 1998

Appl. No.:

/137766

Inventors:

Jashbhai M. Patel - Amherst NY
Ronald S. Finkelstein - East Amherst NY

Assignee:

National Gypsum Company - Charlotte NC

International Classification:

C04B 1100

US Classification:

106781

Abstract:

A method of preparation of gypsum wallboard, as well as a core composition suitable for use therein, are disclosed. The core composition includes a slurry of calcium sulfate hemihydrate (stucco), water, and calcium aluminum lignosulfonate and/or aluminum lignosulfonate.

US Patent:

58580832, Jan 12, 1999

Filed:

May 19, 1997

Appl. No.:

8/858243

Inventors:

Elisha Stav - M.P. Jordan Valley, IL
Edward A. Burkard - East Amherst NY
Ronald S. Finkelstein - East Amherst NY
Daniel A. Winkowski - Tonawanda NY
Lambert J. Metz - Tonawanda NY
Patrick J. Mudd - Tonawanda NY

Assignee:

National Gypsum Company - Charlotte NC

International Classification:

C04B 704
C04B 1128

US Classification:

106735

Abstract:

Cementitious binders include calcium sulfate beta-hemihydrate, a cement component comprising Portland cement, and either silica fume or rice-husk ash. The silica fume or rice-husk ash component is at least about 92 wt % amorphous silica and has an alumina content of about 0. 6 wt % or less.

US Patent:

57226261, Mar 3, 1998

Filed:

Dec 4, 1995

Appl. No.:

8/567149

Inventors:

Robert J. Menchetti - Buffalo NY
Ronald S. Finkelstein - East Amherst NY
Jashbhai M. Patel - Amherst NY
Daniel A. Winkowski - Tonawanda NY

Assignee:

National Gypsum Company - Charlotte NC

International Classification:

A47G 2900

US Classification:

24834601

Abstract:

This disclosure relates to a riser comprising an elongated web having one or more folds which form at least one ridge and slopes extending away from the ridge. When in use as a riser, the web is positioned on edge so that the edge surfaces of the ridges and the slopes engage the bottommost article being supported. The web preferably includes strengthening elements located at at least the ridges. A group of risers are nestable whereby they may be compactly stacked for storage and/or shipping. The edge surfaces have a surface area sufficient to avoid forming a substantial imprint in the article. The risers may be made of a recycled material, such as wood chips, plastic and gypsum, and the risers are reusable.

US Patent:

56859031, Nov 11, 1997

Filed:

Sep 13, 1996

Appl. No.:

8/713727

Inventors:

Elisha Stav - Amherst NY
Edward A. Burkard - East Amherst NY
Ronald S. Finkelstein - East Amherst NY

Assignee:

National Gypsum Company - Charlotte NC

International Classification:

C04B 704
C04B 1128

US Classification:

106735

Abstract:

A cementitious composition useful for water-resistant construction materials, including floor underlayments, backing boards, self-leveling floor materials, road patching materials, fiberboard, fire-proofing sprays, and fire-stopping materials includes about 20 wt. % to about 75 wt. % calcium sulfate beta-hemihydrate, about 10 wt. % to about 50 wt. % Portland cement, about 4 wt. % to about 20 wt. % silica fume and about 1 wt. % to about 50 wt. % pozzolanic aggregate. The Portland cement component may also be a blend of Portland cement with fly ash and/or ground blast slag.