US2869801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring motor
Assignee: Individual
•
Filing: 1957-02-18
•
Granted: 1959-01-20
•
Expires: 1977-02-18
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:03
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/02; G03B1/04; G03B1/12; F; F03; F03G; F03G1/00; F03G1/02; F03G1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2063799A
Cited
US2673694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |