Patent US2156005A successfully refreshed from Google Patents.
US2156005A
Expired / Lapsed
US
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Door operating mechanism
Assignee: Doosan Bobcat North America Inc
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Filing: 1936-10-23
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Granted: 1939-04-25
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Expires: 1956-10-23
Abstract
No abstract record available.
Inventors
- 👤 Alfred O Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:19
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/28; E05D15/30; E05F; E05F15/00; E05F15/50; E05F15/56; E05F15/565; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/51
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) | 1942-04-24 | 1942-10-24 | 1943-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-24 | 1946-10-24 | 1947-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-24 | 1950-10-24 | 1951-04-25 | $7700.00 | Window Closed / Lapsed |