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Patent US2953279A successfully refreshed from Google Patents.
US2953279A
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Safety pressure relief device
Assignee: Black Sivalls and Bryson Inc
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Filing: 1954-09-10
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Granted: 1960-09-20
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Expires: 1974-09-10
Abstract
No abstract record available.
Inventors
- 👤 Robert S Coffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:04
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US138171A
Cited
US328008A
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US2123662A
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US2523068A
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US2548744A
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US2656950A
Cited
US2758749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |