US2533712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust valve with leak detector
Assignee: Westinghouse Electric Corp
•
Filing: 1944-03-29
•
Granted: 1950-12-12
•
Expires: 1964-03-29
Abstract
No abstract record available.
Inventors
- 👤 John M Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:33
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; H01J9/385; F; F04; F04F; F04F9/00; G; G01; G01M; G01M3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1651865A
Cited
US1933322A
Cited
US1951142A
Cited
US2025579A
Cited
US2162209A
Cited
US2254905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |