US2833686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding polytetrafluoroethylene resins
Assignee: EIDP Inc
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Filing: 1955-06-20
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Granted: 1958-05-06
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Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 Sandt Bernd Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:27
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD OF FORMING STRONG NON-POROUS BONDS BETWEEN TWO SURFACES, AT LEAST ONE OF WHICH IS OF POLYTETRAFLUOROETHYLENE RESIN, WHICH COMPRISES THE STEPS OF FORMING AN ASSEMBLY BY DISPOSING BETWEEN AND IN INTIMATE CONTACT WITH SAID SURFACES A RESINOUS COPOLYMER OF 5 TO 50% BY WEIGHT OF HEXAFLUOROPROPYLENE AND 95 TO 50% BY WEIGHT OF TETRAFLUOROETHYLENE, AND HEATING THE RESULTING ASSEMBLY TO A TEMPERATURE OF AT LERAST 327*C.
Claim 2
Independent Claim
68 words
A METHOD OF FORMING STRONG NON-POROUS BONDS BETWEEN TWO SURFACES, AT LEAST ONE OF WHICH IS OF POLYTETRAFLUOROETHYLENE RESIN, WHICH COMPRISES THE STEPS OF FORMING AN ASSEMBLY BY DISPOSING BETWEEN AND IN INTIMATE CONTACT WITH SAID SURFACES A RESINOUS COPOLYMER OF 5 TO 50% BY WEIGHT OF HEXAFLUOROPROPYLENE AND 95 TO 50% BY WEIGHT OF TETRAFLUOROETHYLENE, AND HEATING THE RESULTING ASSEMBLY TO A TEMPERATURE OF AT LERAST 327*C.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |