US2770255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-range safety valve
Assignee: DANIEL AND FLORENCE GUGGENHEIM
•
Filing: 1952-08-16
•
Granted: 1956-11-13
•
Expires: 1972-08-16
Abstract
No abstract record available.
Inventors
- 👤 Esther C Goddard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:34
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/06; F16K15/00; F16K15/02; F16K15/04; F16K15/044; F16K17/08; F16K17/087; F16K2200/00; F16K2200/30; F16K2200/302; Y; Y10; Y10S; Y10S60/00; Y10S60/915; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7905; Y10T137/7922; Y10T137/7927; Y10T137/7928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1367152A
Cited
US1836416A
Cited
US1753024A
Cited
US2079135A
Cited
US2398811A
Cited
US2602467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |