Patent US3679461A successfully refreshed from Google Patents.
US3679461A
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Method for making photopolymerized tetrafluoroethylene films
Assignee: General Electric Co
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Filing: 1970-06-30
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Granted: 1972-07-25
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Expires: 1990-06-30
Abstract
Abstract A METHOD IS PROVIDED FOR IMPROVING THE RATE OF SURFACE PHOTOPOLYMERIZATION OF TETRAFLUORETHYLENE TO MAKE CONTINOUS IMPERFORATE FILMS AND SUBSTRATE-FILM COMPOSITES. SURFACE PHOTOPOLYMERIZATION OF TETRAFLUOROETHYLENE IS ACHIEVED AT PRESSURES ABOVE 25 TORR BY POSITIONING THE SUBSTRATE AT A DISTANCE FROM THE ULTRAVIOLET LIGHT SOURCE WITHIN THE TETRAFLUORETHYLENE PHOTOPOLYMERIZATION ZONE SUFFICIENT TO PROVIDE FOR THE PRODUCTION OF CONTINUOUS FILM. COMPOSITES MADE BY THE SUBJECT METHOD CAN BE UTILIZED TO MAKE CAPACITORS, CRYOGENIC DEVICES, ETC.
Inventors
- 👤 Donald H Maylotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:48
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/60; C; C08; C08F; C08F14/00; C08F14/18; C08F14/26; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18; H01G4/186; B05D2202/00; B05D2202/20; B05D2202/25; B05D2252/00; B05D2252/02; B05D2506/00; B05D2506/10; B05D2506/15
Claims Analysis
Total Claims: 0
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |