Patent US2597976A successfully refreshed from Google Patents.
US2597976A
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Assignee: Wingfoot Corp
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Filing: 1949-10-11
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Granted: 1952-05-27
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Expires: 1969-10-11
Abstract
No abstract record available.
Inventors
- 👤 Cousins Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:28
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T156/1033; Y10T428/00; Y10T428/21; Y10T428/215; Y10T428/29; Y10T428/2913; Y10T428/2922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A GASKET ELEMENT RESISTANT TO THE SWELLING AND SOLVENT ACTION OF LIQUID HYDROCARBON FUEL AND WHICH RETAINS ITS FLEXIBILITY AND SEALING PROPERTIES OVER A TEMPERATURE OF FROM 200* F. TO -70* F., SAID GASKET ELEMENT COMPRISING AN ENDLESS BODY OF A VULCANIZED RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, A MIXTURE OF NATURAL RUBBER WITH UP TO AN EQUAL AMOUNT OF POLYBUTADIENE, AND A POLYMER RESULTING FROM THE POLYMERIZATION OF FROM 100% TO 75% BY WEIGHT OF BUTADIENE AND FROM 0% TO 25% BY WEIGHT OF STYRENE, SAID ENDLESS BODY BEING COVERED AT LEAST ON ITS ENTIRE INNER PERIPHERY BY A CONTINUOUS LAYER OF A FILM-FORMING MATERIAL WHICH IS RESISTANT TO THE SOLVENT AND SWELLING ACTION OF LIQUID HYDROCARBON FUELS AND SELECTED FROM THE GROUP CONSISTING OF NYLON, POLYALKYLENE POLYSULFIDES, POLYTETRAFLUOROETHYLENE, POLYMONOCHLORTRIFLUORO ETHYLENE, POLYVINYL ALCOHOL, METHYL CELLULOSE, AND A MIXTURE OF NYLON WITH UP TO AN EQUAL AMOUNT BY WEIGHT OF A POLYMER RESULTING FROM THE POLYMERIZATION OF FROM 100% TO 55% BY WEIGHT OF BUTADIENE AND FROM 0% TO 45% BY WEIGHT OF ACRYLONITRILE.
Claim 2
Dependent Claim
177 words
A GASKET ELEMENT RESISTANT TO THE SWELLING AND SOLVENT ACTION OF LIQUID HYDROCARBON FUEL AND WHICH RETAINS ITS FLEXIBILITY AND SEALING PROPERTIES OVER A TEMPERATURE OF FROM 200* F. TO -70* F., SAID GASKET ELEMENT COMPRISING AN ENDLESS BODY OF A VULCANIZED RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, A MIXTURE OF NATURAL RUBBER WITH UP TO AN EQUAL AMOUNT OF POLYBUTADIENE, AND A POLYMER RESULTING FROM THE POLYMERIZATION OF FROM 100% TO 75% BY WEIGHT OF BUTADIENE AND FROM 0% TO 25% BY WEIGHT OF STYRENE, SAID ENDLESS BODY BEING COVERED AT LEAST ON ITS ENTIRE INNER PERIPHERY BY A CONTINUOUS LAYER OF A FILM-FORMING MATERIAL WHICH IS RESISTANT TO THE SOLVENT AND SWELLING ACTION OF LIQUID HYDROCARBON FUELS AND SELECTED FROM THE GROUP CONSISTING OF NYLON, POLYALKYLENE POLYSULFIDES, POLYTETRAFLUOROETHYLENE, POLYMONOCHLORTRIFLUORO ETHYLENE, POLYVINYL ALCOHOL, METHYL CELLULOSE, AND A MIXTURE OF NYLON WITH UP TO AN EQUAL AMOUNT BY WEIGHT OF A POLYMER RESULTING FROM THE POLYMERIZATION OF FROM 100% TO 55% BY WEIGHT OF BUTADIENE AND FROM 0% TO 45% BY WEIGHT OF ACRYLONITRILE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |