US2480108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable by-pass check valve
Assignee: Individual
•
Filing: 1946-01-29
•
Granted: 1949-08-30
•
Expires: 1966-01-29
Abstract
No abstract record available.
Inventors
- 👤 Martin J Barker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:04
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1718390A
Cited
US1496947A
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US1766847A
Cited
US1896395A
Cited
US1996469A
Cited
US1955903A
Cited
US2098725A
Cited
US2253685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |