Richard K. Hallmark

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Largo, FL, US

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Patents Grantslast 30 patents

Information Patent Grant
Digestion products of polyalkylene terephthalate polymers and polyc...
- Patent number 4,873,268
- Issue date Oct 10, 1989
- Sloss Industries Corporation
- Richard K. Hallmark
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Distilled products of polyethylene terephthalate polymers and polyc...
- Patent number 4,853,419
- Issue date Aug 1, 1989
- Sloss Industries Corporation
- Richard K. Hallmark
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Distilled products of polyethylene terephthalate polymers and polyc...
- Patent number 4,758,607
- Issue date Jul 19, 1988
- Sloss Industries Corporation
- Richard K. Hallmark
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Digestion products of polyalkylene terephthalate polymers and polyc...
- Patent number 4,539,341
- Issue date Sep 3, 1985
- Jim Walter Resources, Inc.
- Richard K. Hallmark
- B32 - LAYERED PRODUCTS