J. S. Gwinn

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Bartlesville, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Continuous mixer
- Patent number RE34172
- Issue date Feb 2, 1993
- Phillips Petroleum Company
- J. S. Gwinn
- 366 - Agitating
Information Patent Grant
Process for improving thermoplastic hydrocarbon polymers with polys...
- Patent number 5,037,895
- Issue date Aug 6, 1991
- Phillips Petroleum Company
- Ted W. Marker
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Continuous mixer
- Patent number 4,767,216
- Issue date Aug 30, 1988
- Phillips Petroleum Company
- J. S. Gwinn
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Extrusion control process and apparatus
- Patent number 4,671,908
- Issue date Jun 9, 1987
- Phillips Petroleum Company
- J. S. Gwinn
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of extruding and pelletizing expandable polymeric compositio...
- Patent number 4,385,016
- Issue date May 24, 1983
- Phillips Petroleum Company
- J. S. Gwinn
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
In-line die fastened to breaker plate for support
- Patent number 3,986,816
- Issue date Oct 19, 1976
- Phillips Petroleum Company
- J. S. Gwinn
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL