US2687841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve used as a control
Assignee: Individual
•
Filing: 1950-12-01
•
Granted: 1954-08-31
•
Expires: 1970-12-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:17
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/12; F16T1/14; F04; F04B; F04B49/00; F04B49/02; F04B49/03; F04B49/035; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/264; Y10T137/2931; Y10T137/3003; Y10T137/3102; Y10T137/3105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2007358A
Cited
US2330027A
Cited
US2552518A
Cited
US2509879A
Cited
US2505663A
Cited
US2532607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |