US2432088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure actuated valve
Assignee: VALVE ENGINEERING Co
•
Filing: 1942-03-19
•
Granted: 1947-12-09
•
Expires: 1962-03-19
Abstract
No abstract record available.
Inventors
- 👤 Walter T Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:38
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/16; F16K31/163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US406193A
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US1187946A
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US1389300A
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US1429665A
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US1980617A
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US1977554A
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US1949071A
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US2032185A
Cited
US2161279A
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US2148616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |