Patent US2580751A successfully refreshed from Google Patents.
US2580751A
Expired / Lapsed
US
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Dashpot for servomotors
Assignee: Motors Liquidation Co
•
Filing: 1947-10-24
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Granted: 1952-01-01
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Expires: 1967-10-24
Abstract
No abstract record available.
Inventors
- 👤 William A Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:40
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; F15B11/072; F15B11/076; F15B2211/00; F15B2211/20; F15B2211/21; F15B2211/212; F15B2211/40; F15B2211/405; F15B2211/40507; F15B2211/40576; F15B2211/40584; F15B2211/47; F15B2211/473; F15B2211/50; F15B2211/505; F15B2211/50563; F15B2211/50581
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US489757A
Cited
US1551372A
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US897676A
Cited
US1205818A
Cited
US1685750A
Cited
US2001988A
Cited
US2326498A
Cited
US2363867A
Cited
US2384760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |