US2902276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door-operators and controls
Assignee: Individual
•
Filing: 1956-12-13
•
Granted: 1959-09-01
•
Expires: 1976-12-13
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Purdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:16
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/70; E05F15/77; E05F15/78; 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)
US2149177A
Cited
US2596591A
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US2676294A
Cited
US2695977A
Cited
US2641713A
Cited
US2758836A
Cited
US2750453A
Cited
US2720284A
Cited
US2760134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |