US2157554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foot valve for pump suction lines
Assignee: Individual
•
Filing: 1938-01-03
•
Granted: 1939-05-09
•
Expires: 1958-01-03
Abstract
No abstract record available.
Inventors
- 👤 William K Mcfarlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:54
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037; F16; F16K; F16K15/00; F16K15/14; F16K15/16; F16K15/161; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/794; Y10T137/8085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-05-08 | 1942-11-07 | 1943-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-08 | 1946-11-07 | 1947-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-08 | 1950-11-07 | 1951-05-09 | $7700.00 | Window Closed / Lapsed |