US2615668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Individual
•
Filing: 1948-01-20
•
Granted: 1952-10-28
•
Expires: 1968-01-20
Abstract
No abstract record available.
Inventors
- 👤 Ernest Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:37
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2937
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US48421A
Cited
US1208274A
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US1761721A
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US1876988A
Cited
DE533899C
Cited
US1994098A
Cited
US2197995A
Cited
GB502094A
Cited
US2305840A
Cited
US2387660A
Cited
US2471623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |