US2644480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid valve
Assignee: Individual
•
Filing: 1948-10-27
•
Granted: 1953-07-07
•
Expires: 1968-10-27
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Earle
- 👤 Carl A Covington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:33
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7837; Y10T137/7904; Y10T137/7905
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE17022E
Cited
US1808212A
Cited
US1124203A
Cited
US1770912A
Cited
US1624130A
Cited
US2030143A
Cited
GB439602A
Cited
US2243807A
Cited
US2306029A
Cited
US2332630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |