Patent US2665286A successfully refreshed from Google Patents.
Patent US2023909A successfully refreshed from Google Patents.
US2023909A
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Mechanical door opener and closer for overhead doors
Assignee: SPENCER F WREAD
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Filing: 1932-02-08
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Granted: 1935-12-10
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Expires: 1952-02-08
Abstract
No abstract record available.
Inventors
- 👤 William E Wread
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:44
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/16; E05D15/24; E05D13/00; E05D13/10; E05D13/12; E05D13/1207; E05D13/1215; E05D13/1253; E05D13/1261; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/622; E05Y2201/658; E05Y2201/668; E05Y2201/67; E05Y2900/00; E05Y2900/10; E05Y2900/106
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) | 1938-12-09 | 1939-06-10 | 1939-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-12-09 | 1943-06-10 | 1943-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-12-09 | 1947-06-10 | 1947-12-10 | $7700.00 | Window Closed / Lapsed |