Patent US2989433A successfully refreshed from Google Patents.
US2989433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing laminated structures
Assignee: EIDP Inc
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Filing: 1957-06-18
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Granted: 1961-06-20
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Expires: 1977-06-18
Abstract
No abstract record available.
Inventors
- 👤 Yuan Edward Lung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:11
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B29; B29C; B29C70/00; B29C70/003; B29C70/0035; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/036; B29K; B29K2309/00; B29K2309/08; H05K1/0366; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/015; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3528
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN THE PROCESS OF PREPARING A LAMINATED STRUCTURE COMPRISING HEATING AND PRESSING AN ASSEMBLY OF ONE OUTER LAYER COMPRISING POLYTETRAFLUOROETHYLENE, THE OTHER OUTER LAYER BEING A METAL AND AN INTERMEDIATE BONDING LAYER COMPRISING A COPOLYMER OF 50-95% TETRAFLUOROETHYLENE AND 50-5% HEXAFLUOROPROPENE, THE IMPROVEMENT WHICH COMPRISES FORMING SAID INTERMEDIATE LAYER BY COATING BOTH SIDES OF A GLASS FABRIC WITH SAID COPOLYMER AND INCORPORATING SAID INTERLAYER IN SAID ASSEMBLY PRIOR TO SAID HEATING AND PRESSING STEP, WHEREBY SAID COPOLYMER IS PREVENTED FROM SPEWING AT THE EDGES OF SAID ASSEMBLY DURING SAID HEATING AND PRESSING STEP.
Claim 2
Dependent Claim
93 words
IN THE PROCESS OF PREPARING A LAMINATED STRUCTURE COMPRISING HEATING AND PRESSING AN ASSEMBLY OF ONE OUTER LAYER COMPRISING POLYTETRAFLUOROETHYLENE, THE OTHER OUTER LAYER BEING A METAL AND AN INTERMEDIATE BONDING LAYER COMPRISING A COPOLYMER OF 50-95% TETRAFLUOROETHYLENE AND 50-5% HEXAFLUOROPROPENE, THE IMPROVEMENT WHICH COMPRISES FORMING SAID INTERMEDIATE LAYER BY COATING BOTH SIDES OF A GLASS FABRIC WITH SAID COPOLYMER AND INCORPORATING SAID INTERLAYER IN SAID ASSEMBLY PRIOR TO SAID HEATING AND PRESSING STEP, WHEREBY SAID COPOLYMER IS PREVENTED FROM SPEWING AT THE EDGES OF SAID ASSEMBLY DURING SAID HEATING AND PRESSING STEP.
References Cited (Backward Citations)
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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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |