US2889070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety pressure relief device support
Assignee: Black Sivalls and Bryson Inc
•
Filing: 1955-09-29
•
Granted: 1959-06-02
•
Expires: 1975-09-29
Abstract
No abstract record available.
Inventors
- 👤 Robert S Coffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:37
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)
US146619A
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US530057A
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US1287223A
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US2111480A
Cited
GB488953A
Cited
US2291374A
Cited
US2291360A
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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |