US3544046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for opening and closing hatch of airborne craft
Assignee: ALEXEI YAKOVLEVICH BELOLIPETSK
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Filing: 1968-08-01
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Granted: 1970-12-01
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Expires: 1988-08-01
Abstract
No abstract record available.
Inventors
- 👤 Alexei Yakovlevic Belolipetsky
- 👤 Vladimir Tarasovich Shvedov
- 👤 Viktor Timofeevich Chmil
- 👤 Valentin Zinovievi Bragilevsky
- 👤 Sergei Dmitrievich Elmesev
- 👤 Mikhail Evmenovich Babkin
- 👤 Vadim Alexandrovich Maximov
- 👤 Valentin Nikolaevich Gelprin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:22
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/14; B64C1/1407; B64C1/1415
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) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |