US2922504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector mechanism
Assignee: F B REDINGTON Co
•
Filing: 1956-02-01
•
Granted: 1960-01-26
•
Expires: 1976-02-01
Abstract
No abstract record available.
Inventors
- 👤 Harry E Engleson
- 👤 Ellsworth A Hartbauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:09
CPC Classifications
B; B65; B65B; B65B57/00; B65B57/10; B65B57/16; B65B57/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1555596A
Cited
US1852924A
Cited
US2046800A
Cited
US2425438A
Cited
US2505468A
Cited
US2656962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |