Patent US3549964A successfully refreshed from Google Patents.
US3549964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for deicing surfaces of thin-walled structures
Assignee: Individual
•
Filing: 1968-03-01
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Granted: 1970-12-22
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Expires: 1988-03-01
Abstract
No abstract record available.
Inventors
- 👤 Igor Anatolievich Levin
- 👤 Anatoly Yakovlevich Levin
- 👤 Nikolai Eystigneevich Fedorov
- 👤 Iosif Alexandrovich Rogov
- 👤 Erik Eduardovich Afanasov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:34
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/16; B64D15/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |