US2891518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism for controlling delivery of fluid under pressure to a fluid operatedmotor
Assignee: Individual
•
Filing: 1956-12-10
•
Granted: 1959-06-23
•
Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Krapf John Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:46
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0405; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87193; Y10T137/87201; Y10T137/87217; Y10T137/87225; Y10T137/87233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US663727A
Cited
US2376918A
Cited
US2583185A
Cited
US2569881A
Cited
US2451013A
Cited
US2778342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |