US2774366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-responsive check valve
Assignee: Standard Oil Co
•
Filing: 1954-09-24
•
Granted: 1956-12-18
•
Expires: 1974-09-24
Abstract
No abstract record available.
Inventors
- 👤 John R Dado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:02
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1819
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB278927A
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US369474A
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US1510813A
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US2026704A
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US2128292A
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GB536051A
Cited
US2296135A
Cited
US2589581A
Cited
US2707965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |