Patent DE562810C successfully refreshed from Google Patents.
Patent US2006082A successfully refreshed from Google Patents.
US2006082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operating mechanism
Assignee: RICHMOND FIREPROOF DOOR Co
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Filing: 1934-08-17
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Granted: 1935-06-25
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Expires: 1954-08-17
Abstract
No abstract record available.
Inventors
- 👤 James E Bancroft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:16
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665
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) | 1938-06-24 | 1938-12-24 | 1939-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-24 | 1942-12-24 | 1943-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-24 | 1946-12-24 | 1947-06-25 | $7700.00 | Window Closed / Lapsed |