US2597057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety valve
Assignee: J E LONERGAN CO
•
Filing: 1946-04-12
•
Granted: 1952-05-20
•
Expires: 1966-04-12
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Bergquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:57
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0433; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7739; Y10T137/7744; Y10T137/7745; Y10T137/7747
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US306208A
Cited
US1952646A
Cited
US2035129A
Cited
US2165611A
Cited
US2345389A
Cited
US2501730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |