Patent US2980965A successfully refreshed from Google Patents.
US2980965A
Expired / Lapsed
US
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Method of making plastic film
Assignee: AMF Inc
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Filing: 1958-02-28
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Granted: 1961-04-25
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Expires: 1978-02-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Infantino
- 👤 Donald A Savitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:30
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
56 words
A METHOD OF MAKING POLYTETRAFLUOROETHYLENE FILM COMPRISING IN COMBINATION THE STEPS OF COATING AN ALUMINUM SURFACE WITH A DISPERSION OF POLYTETRAFLUOROETHYLENE IN A LIQUID, DRYING AND SINTERING SAID DISPERSION TO FORM A FILM AND THEREAFTER HEATING SAID FILM COATED ALUMINUM SURFACE TO REDUCE FILM ADHESION TO SAID ALUMINUM SURFACE AND PEELING SAID FILM FROM SAID SURFACE.
References Cited (Backward Citations)
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Cited
US2485691A
Cited
US2540962A
Cited
US2578522A
Cited
US2751315A
Cited
US2774109A
Cited
US2710266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |