US2650819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical spring
Assignee: Individual
•
Filing: 1948-05-12
•
Granted: 1953-09-01
•
Expires: 1968-05-12
Abstract
No abstract record available.
Inventors
- 👤 Owen W Marlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:05
CPC Classifications
F; F16; F16F; F16F3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US736333A
Cited
US1486295A
Cited
US1628561A
Cited
GB270169A
Cited
FR772052A
Cited
DE606635C
Cited
US1988295A
Cited
US2238280A
Cited
US2248447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |