Keith G. Johnson

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for making structural profiles
- Patent number 4,154,563
- Issue date May 15, 1979
- ARCO Polymers, Inc.
- Keith G. Johnson
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Apparatus for making structural foam profiles
- Patent number 4,022,557
- Issue date May 10, 1977
- ARCO Polymers, Inc.
- Keith G. Johnson
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Apparatus for the continuous extrusion of small cross-section therm...
- Patent number 3,966,373
- Issue date Jun 29, 1976
- ARCO Polymers, Inc.
- Keith G. Johnson
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL