Patent US2923541A successfully refreshed from Google Patents.
US2923541A
Expired / Lapsed
US
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Safety overhead door operator
Assignee: Individual
•
Filing: 1958-04-14
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Granted: 1960-02-02
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Expires: 1978-04-14
Abstract
No abstract record available.
Inventors
- 👤 Glenn P Gessell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:38
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/40; E05F15/41; E05F15/60; E05F15/603; E05F15/665; E05F15/668; E05F15/681; E05F15/686; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA475597A
Cited
US1897391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |