US2868412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety pressure relief device
Assignee: Black Sivalls and Bryson Inc
•
Filing: 1954-04-15
•
Granted: 1959-01-13
•
Expires: 1974-04-15
Abstract
No abstract record available.
Inventors
- 👤 Robert S Coffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:57
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)
US1250680A
Cited
US1455582A
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US2123662A
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US2209399A
Cited
US2261035A
Cited
US2523068A
Cited
US2548744A
Cited
US2656950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |