US2597474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry pipe valve
Assignee: Individual
•
Filing: 1948-09-23
•
Granted: 1952-05-20
•
Expires: 1968-09-23
Abstract
No abstract record available.
Inventors
- 👤 William B Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:45
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/20; F16K1/2007; F16K1/2042; F16K1/2057; F16K1/2071; F16K1/32; F16K1/34; F16K1/42; F16K1/425
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1000799A
Cited
GB268303A
Cited
US1619033A
Cited
AT139056B
Cited
US1898899A
Cited
US1947257A
Cited
US2294105A
Cited
CH226084A
Cited
US2366520A
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 |