US3223676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a molded gasket from polytetrafluoroethylene and a butadiene-acrylonitrile elastomer
Assignee: Johns Manville Corp
•
Filing: 1960-07-07
•
Granted: 1965-12-14
•
Expires: 1980-07-07
Abstract
No abstract record available.
Inventors
- 👤 Howard L Rucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:37
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/02; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; C08L23/00; C08L23/26; C08L23/28; C08L23/283; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS OF PRODUCING A GASKET COMPRISING PREPARING A COMPOSITION CONSISTING ESSENTIALLY OF POLYTETRAFLUOROETHYLENE IN SOLID PARTICULATE CONDITION MIXED IN AN ELASTOMERIC BUTADIENE-ACRYLONITRILE COPOLYMER MATRIX IN AN AMOUNT BETWEEN 5 AND 60 PARTS PER WEIGHT FOR EACH 100 PARTS OF SAID COPOLYMER, AND FORMING THE COMPOSITION INTO A DESIRED SELF-CONTAINING AND SELF-SUPPORTING SHAPE UNDER THE INFLUENCE OF HEAT AND PRESSURE.
Claim 2
Dependent Claim
60 words
A PROCESS OF PRODUCING A GASKET COMPRISING PREPARING A COMPOSITION CONSISTING ESSENTIALLY OF POLYTETRAFLUOROETHYLENE IN SOLID PARTICULATE CONDITION MIXED IN AN ELASTOMERIC BUTADIENE-ACRYLONITRILE COPOLYMER MATRIX IN AN AMOUNT BETWEEN 5 AND 60 PARTS PER WEIGHT FOR EACH 100 PARTS OF SAID COPOLYMER, AND FORMING THE COMPOSITION INTO A DESIRED SELF-CONTAINING AND SELF-SUPPORTING SHAPE UNDER THE INFLUENCE OF HEAT AND PRESSURE.
References Cited (Backward Citations)
US2976257A
Cited
US2459721A
Cited
US2473319A
Cited
US2718452A
Cited
US2754223A
Cited
US2717025A
Cited
US2777783A
Cited
US2844557A
Cited
US2824089A
Cited
US3019206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |