Patent US2503521A successfully refreshed from Google Patents.
US2503521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission mechanism
Assignee: Individual
•
Filing: 1946-06-26
•
Granted: 1950-04-11
•
Expires: 1966-06-26
Abstract
No abstract record available.
Inventors
- 👤 Fred N Stover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:02
CPC Classifications
F; F16; F16H; F16H21/00; F16H21/10; F16H21/16; F16H21/18; F16H21/20; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18288; Y10T74/18296
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US82585A
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US208411A
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US226130A
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US1336799A
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US629039A
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US1031217A
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US1742644A
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CH149152A
Cited
GB432063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |