US2759487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve
Assignee: MERIT ENGINEERING Inc
•
Filing: 1952-04-23
•
Granted: 1956-08-21
•
Expires: 1972-04-23
Abstract
No abstract record available.
Inventors
- 👤 Frank C Lornitzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:07
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/10; F16K17/105; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7765; Y10T137/7768
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US781913A
Cited
US2164669A
Cited
US2520893A
Cited
US2523826A
Cited
US2587161A
Cited
US2577999A
Cited
US2597057A
Cited
US2601870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |