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US2850274A
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US
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Automatic spring-pressure limiting device
Assignee: Servo Corp of America
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Filing: 1954-03-04
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Granted: 1958-09-02
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Expires: 1974-03-04
Abstract
No abstract record available.
Inventors
- 👤 Luis F Villar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:59
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/04; F16F1/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US393368A
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US2101746A
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US733790A
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US968076A
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US1956108A
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US2297715A
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US2380963A
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US2625857A
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US2670200A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |