US2903881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timing apparatus
Assignee: Individual
•
Filing: 1955-06-27
•
Granted: 1959-09-15
•
Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Jack L Frolow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:22
CPC Classifications
G; G04; G04D; G04D7/00; G04D7/12; G04D7/1207; G04D7/1214; G04D7/1221
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2437929A
Cited
US2426602A
Cited
US2425165A
Cited
US2564636A
Cited
US2687511A
Cited
US2667061A
Cited
US2658381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |