US3033316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low gradient springs and spring motors using the same
Assignee: Individual
•
Filing: 1958-10-20
•
Granted: 1962-05-08
•
Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:25
CPC Classifications
F; F03; F03G; F03G1/00; F03G1/02; F03G1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2899193A
Cited
US1964280A
Cited
US2063799A
Cited
US2647743A
Cited
US2673694A
Cited
US2835344A
Cited
US2869801A
Cited
US2959091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |