US2944810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operating mechanism
Assignee: ZETA ELECTRONICS
•
Filing: 1958-08-21
•
Granted: 1960-07-12
•
Expires: 1978-08-21
Abstract
No abstract record available.
Inventors
- 👤 David R Stuettig
- 👤 Virgil D Jones
- 👤 Richard G Golding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:31
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665; E05F15/668; E05F15/673; E05Y; E05Y2400/00; E05Y2400/10; E05Y2400/52; E05Y2400/53; E05Y2400/54; E05Y2400/55; E05Y2400/552; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2253170A
Cited
US2533116A
Cited
US2637550A
Cited
US2676294A
Cited
US2572785A
Cited
US2753179A
Cited
US2805059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |