US2767768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating compositions and method of forming same
Assignee: MW Kellogg Co
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Filing: 1952-08-01
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Granted: 1956-10-23
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Expires: 1972-08-01
Abstract
No abstract record available.
Inventors
- 👤 Jelinek Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; B; B29; B29C; B29C63/00; B29C63/22; B29C65/00; B29C65/02; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C66/50; B29C66/51; B29C66/54; B29C66/547; B29C66/70; B29C66/71; B29C66/712; F16J15/02; F16J15/06; F16J15/10; F16J15/104; F16J15/328; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29L; B29L2024/00; B29L2024/003; B29L2031/00; B29L2031/26; B29L2031/265; B29L2031/709; B29L2031/7096; B29L2031/7102; Y; Y10; Y10S; Y10S277/00; Y10S277/91; Y10S277/935; Y10S277/936; Y10S285/00; Y10S285/909; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/31504; Y10T428/31855; Y10T428/31931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD FOR FORMING A GASKET COMPRISING: FORMING A RELATIVELY LARGE CORE COMPRISING A SOLID POLYMER OF TETRAFLUOROETHYLENE; COVERING SAID CORE WITH A RELATIVELY THIN SHEATH COMPRISING A SOLID POLYMER OF TRIFLUOROCHLOROETHYLENE; HEATING THE RESULTING ARTICLE IN A DIE MAINTAINED AT A TEMPERATURE BETWEEN 415* F. AND ABOUT 625* F. AND UNDER COMPACTING PRESSUE BETWEEN ABOUT 500 AND ABOUT 25,000 POUNDS PER SQUARE INCH FOR A TIME SUFFICIENT TO PERMIT SAID SHEATH TO BE BROUGHT INTO CONTIGUITY WITH AND TO ASSUME THE EXTERNAL CONTOUR OF SAID CORE; AND REMOVING THE GASKET THUS FORMED FROM SAID DIE.
Claim 2
Independent Claim
96 words
A METHOD FOR FORMING A GASKET COMPRISING: FORMING A RELATIVELY LARGE CORE COMPRISING A SOLID POLYMER OF TETRAFLUOROETHYLENE; COVERING SAID CORE WITH A RELATIVELY THIN SHEATH COMPRISING A SOLID POLYMER OF TRIFLUOROCHLOROETHYLENE; HEATING THE RESULTING ARTICLE IN A DIE MAINTAINED AT A TEMPERATURE BETWEEN 415* F. AND ABOUT 625* F. AND UNDER COMPACTING PRESSUE BETWEEN ABOUT 500 AND ABOUT 25,000 POUNDS PER SQUARE INCH FOR A TIME SUFFICIENT TO PERMIT SAID SHEATH TO BE BROUGHT INTO CONTIGUITY WITH AND TO ASSUME THE EXTERNAL CONTOUR OF SAID CORE; AND REMOVING THE GASKET THUS FORMED FROM SAID DIE.
References Cited (Backward Citations)
US2459721A
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US2661182A
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US2533501A
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US2597976A
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US2717024A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |