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David R. Stewart
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Richmond, TX, US
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last 30 patents
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Patent Grant
Conversion of sticky elastomeric polymer crumb into pellets without...
Patent number
6,458,300
Issue date
Oct 1, 2002
Kraton Polymers US LLC
Eleanor Meyer de Groot
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Crosslinkable low viscosity star polymer blends
Patent number
5,446,104
Issue date
Aug 29, 1995
Shell Oil Company
Dale L. Handlin
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Method of shaping a laminated thermoplastic billet
Patent number
4,921,647
Issue date
May 1, 1990
Shell Oil Company
David R. Stewart
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Forming laminated billets from individual billets
Patent number
4,921,646
Issue date
May 1, 1990
Shell Oil Company
David R. Stewart
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Mold press with dielectric electrodes
Patent number
4,906,172
Issue date
Mar 6, 1990
Shell Oil Company
David R. Stewart
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Plastic container with enhanced insulation
Patent number
4,886,187
Issue date
Dec 12, 1989
Shell Oil Company
David R. Stewart
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Continuous lid seam
Patent number
4,867,336
Issue date
Sep 19, 1989
Shell Oil Company
David R. Stewart
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL