Patent US2453844A successfully refreshed from Google Patents.
US2453844A
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Snap acting mechanism adapted for operating valves of steam engines
Assignee: Standard Oil Development Co
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Filing: 1946-04-12
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Granted: 1948-11-16
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Expires: 1966-04-12
Abstract
No abstract record available.
Inventors
- 👤 Hungate William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:17
CPC Classifications
F; F01; F01L; F01L21/00; F01L21/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/18896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US953993A
Cited
US1506929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |