Patent FR2254871B1 successfully refreshed from Google Patents.
US3511682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sintered polytetrafluoroethylene films on elastomers
Assignee: United States Department of the Navy
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Filing: 1965-12-30
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Granted: 1970-05-12
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Expires: 1985-12-30
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Sands
- 👤 Earl J Kohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:08
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2470772A
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US2752317A
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US2764505A
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US2937156A
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US2974059A
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US3088938A
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US3170811A
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US3304221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |