US2709583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanism for mine doors
Assignee: Individual
•
Filing: 1950-05-08
•
Granted: 1955-05-31
•
Expires: 1970-05-08
Abstract
No abstract record available.
Inventors
- 👤 George G Gdovichin
- 👤 Bogdanski Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:09
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/627; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; E05Y2900/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US286549A
Cited
US1167318A
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US1315308A
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US971423A
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US1199199A
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US1432058A
Cited
US1430206A
Cited
US1539980A
Cited
US1681962A
Cited
US2000515A
Cited
US2335336A
Cited
US2388182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |