Patent US2980286A successfully refreshed from Google Patents.
US2980286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety pressure relief device support
Assignee: Black Sivalls and Bryson Inc
•
Filing: 1956-10-08
•
Granted: 1961-04-18
•
Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Robert S Coffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:41
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/162
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2123662A
Cited
US2523068A
Cited
US2694503A
Cited
US2548744A
Cited
FR1074046A
Cited
US2766904A
Cited
US2758749A
Cited
US2716506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |