US2764173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-relief safety valves
Assignee: Individual
•
Filing: 1952-04-21
•
Granted: 1956-09-25
•
Expires: 1972-04-21
Abstract
No abstract record available.
Inventors
- 👤 Charles N Renner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:37
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; F16K17/16; F16K17/162; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714; Y10T137/1729; Y10T137/794; Y10T137/8122
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US540419A
Cited
US875481A
Cited
US1185333A
Cited
US1250680A
Cited
US1655433A
Cited
US1959822A
Cited
US1912458A
Cited
US2106176A
Cited
US2608201A
Cited
US2562672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |