US2608986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow control valve
Assignee: Individual
•
Filing: 1945-07-23
•
Granted: 1952-09-02
•
Expires: 1965-07-23
Abstract
No abstract record available.
Inventors
- 👤 William T Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:46
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B13/00; F15B13/02; F15B13/04; F15B13/0416; F15B13/0417; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/3056; F15B2211/30585; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/415; F15B2211/41527; F15B2211/46; F15B2211/50; F15B2211/505; F15B2211/50563; F15B2211/70; F15B2211/71; F15B2211/75; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |