US2698157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternate manual and automatically operated valve
Assignee: Individual
•
Filing: 1951-11-23
•
Granted: 1954-12-28
•
Expires: 1971-11-23
Abstract
No abstract record available.
Inventors
- 👤 Oscar H Ludeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:48
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/14; F16K31/143; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/87064
Claims Analysis
Total Claims: 0
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US2601578A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |