Patent US2544448A successfully refreshed from Google Patents.
US2544448A
Expired / Lapsed
US
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Motor operated valve shaft
Assignee: AERO SUPPLY Manufacturing CO Inc
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Filing: 1945-04-11
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Granted: 1951-03-06
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Expires: 1965-04-11
Abstract
No abstract record available.
Inventors
- 👤 George T Downey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:54
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/05; F16K31/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1074428A
Cited
US1173764A
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US1547306A
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US1698174A
Cited
US2044025A
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US2318010A
Cited
US2315389A
Cited
US2327959A
Cited
US2387533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |