US2685276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operated pressure control
Assignee: Individual
•
Filing: 1951-04-05
•
Granted: 1954-08-03
•
Expires: 1971-04-05
Abstract
No abstract record available.
Inventors
- 👤 Charles P Dyken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:31
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/042; F15B11/0426; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30525; F15B2211/315; F15B2211/31523; F15B2211/31535; F15B2211/32; F15B2211/321; F15B2211/324; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/40576; F15B2211/40592; F15B2211/415; F15B2211/41509; F15B2211/42; F15B2211/426; F15B2211/455; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7052; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/877; Y10T137/87708; Y10T137/87748; Y10T137/87909
Claims Analysis
Total Claims: 0
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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) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |