US2531159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for burner cutoff and signaling means upon tank leakage
Assignee: Individual
•
Filing: 1948-04-15
•
Granted: 1950-11-21
•
Expires: 1968-04-15
Abstract
No abstract record available.
Inventors
- 👤 William G Rowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:06
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/22; B65D90/24; B65D90/48; B65D90/50; B65D90/51; B65D90/511; F; F16; F16L; F16L2101/00; F16L2101/30; F23; F23N; F23N2239/00; F23N2239/06; Y; Y10; Y10T; Y10T137/00; Y10T137/5762; Y10T137/8158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1469346A
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US2192858A
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US2407515A
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US2439562A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |