US2826178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control valve mechanism
Assignee: Individual
•
Filing: 1951-09-19
•
Granted: 1958-03-11
•
Expires: 1971-09-19
Abstract
No abstract record available.
Inventors
- 👤 Krapf John Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0402; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86606; Y10T137/86879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2157240A
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GB495283A
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US2234009A
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US2369505A
Cited
US2365075A
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US2388662A
Cited
US2370137A
Cited
GB598884A
Cited
US2614539A
Cited
US2582088A
Cited
US2608263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |