Thomas C Shepherd

US Patent:

42083648, Jun 17, 1980

Filed:

Jun 12, 1978

Appl. No.:

5/914421

Inventors:

Thomas H. Shepherd - Hopewell NJ

International Classification:

B29D 1100

US Classification:

264 1

Abstract:

There is provided a mold comprising a male and a female mold member fabricated from thermoplastic polymeric materials which, in very thin sections are flexible under polymerization conditions, but, under said conditions are sufficiently inflexible in thick sections to retain their shape and surface characteristics. Said mold is provided, on either the male or the female member with a thin rim which, during the polymerization process, flexes and permits the mold members to approach each other and compensate for the shrinkage that occurs during polymerization. Said thin rim further forms the edge of the finished lens.

US Patent:

48156906, Mar 28, 1989

Filed:

Feb 9, 1988

Appl. No.:

7/153974

Inventors:

Thomas H. Shepherd - Hopewell NJ

International Classification:

B29D 1100
B29C 3310

US Classification:

249 82

Abstract:

There is provided a mold fabricated from thermoplastic material incorporatinog a thin flexible, substantially knife-edged rim projecting from the periphery of the mold cavity on both the male and female portions thereof, and having a reservoir to contain additional monomer, such reservoir being separated from the mold cavity by the conjunction or mating line of the peripheral rim projections. Such molds are useful for the molding of optical implants which do not require further machining or similar treatment.

US Patent:

62741004, Aug 14, 2001

Filed:

Nov 4, 1999

Appl. No.:

9/434215

Inventors:

Joseph L. Shepherd - San Fernando CA
Thomas J. Shepherd - San Fernando CA

Assignee:

J.L. Shepherd & Associated - San Fernando CA

International Classification:

B01J 1908

US Classification:

4221863

Abstract:

A process irradiator includes a heavily shielded, generally cylindrical, housing with a heavily shielded top. A radiation source includes source elements in several tubes extending from the top into a shielded storage cask below the center of the housing floor. A circular track concentrically positioned relative to the track guides a motor-driven carousel carrying a number of turntables which carry material to be irradiated, the turntables being rotatable on their axes. A heavy shielded door provides access to the turntables which are successively rotated on the carousel to a position adjacent the door opening. A lifting structure on the top includes two or more lifting devices which permit selective lifting of the source elements from the storage cask into the housing. Interlock controls prevent the door from opening and the carousel from rotating unless all source elements are stored in the storage cask.

US Patent:

41218965, Oct 24, 1978

Filed:

Mar 24, 1976

Appl. No.:

5/670031

Inventors:

Thomas H. Shepherd - Hopewell NJ

International Classification:

B29C 300

US Classification:

425412

Abstract:

There is provided a mold comprising a male and a female mold member fabricated from thermoplastic polymeric materials which, in very thin sections are flexible under polymerization conditions, but, under said conditions are sufficiently inflexible in thick sections to retain their shape and surface characteristics. Said mold is provided, on either the male or the female member with a thin rim which, during the polymerization process, flexes and permits the old members to approach each other and compensate for the shrinkage that occurs during polymerization. Said thin rim further forms the edge of the finished lens.

US Patent:

39903818, Nov 9, 1976

Filed:

Sep 27, 1974

Appl. No.:

5/510125

Inventors:

Thomas H. Shepherd - Hopewell NJ
Francis E. Gould - Princeton NJ

Assignee:

National Patent Development Corporation - New York NY

International Classification:

C03C 1700

US Classification:

114 67R

Abstract:

Hydrophilic polymers, i. e. , hydrophilic cellulose esters, hydrophilic cellulose ethers, hydrophilic polyurethanes, hydrophilic vinyl lower alkyl ether polymers, vinyl alcohol group containing polymers, partially hydrolized polyacrylonitrite, ethylene-maleic anhydride copolymer, stryene-maleic anhydride copolymer, proteins, high molecular weight polyalkylene oxides or phenoxy resins, having encapsulated therein either or both anti-fouling agents or pigments is applied as a coating to underwater portions of a marine structure so as to reduce the drag of said structure.

US Patent:

39418588, Mar 2, 1976

Filed:

Aug 7, 1973

Appl. No.:

5/386430

Inventors:

Thomas H. Shepherd - Princeton NJ
Francis E. Gould - Princeton NJ

Assignee:

National Patent Development Corporation - New York NY

International Classification:

C08K 324
C08K 501
C08L 3102

US Classification:

260885

Abstract:

A process for preparing hydrophilic cross-linked polymers and products prepared thereby, said process comprising admixing in a solvent-free system in the presence of a free radical, vinyl polymerization catalyst and reacting a major amount of a water-soluble polymerizable monoester of an olefinic acid having at least one substituted functional group with a minor amount of a polymerizable diester of one of said olefinic acids having at least two esterifiable hydroxyl groups. The novel products include a solid friable foam which can be disintegrated to powder. Shaped bodies can be prepared in the form of articles which can be cast with additives such as fragrances, medicinals, flavors, chemicals and the like, which are gradually released from the article when it is wetted in water or alcohol. Liquid casting syrups adapted to be polymerized in situ with or without additives can be formed. The casting syrups can be prepared in water to yield a polymer soluble in alcohol which is suitable for formation of hydrophilic coatings as by spray, dip, casting and the like.