US2923523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve
Assignee: Wendell Coffee Co
•
Filing: 1957-02-08
•
Granted: 1960-02-02
•
Expires: 1977-02-08
Abstract
No abstract record available.
Inventors
- 👤 Charles R Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:46
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2261
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1852900A
Cited
US2059687A
Cited
US2586927A
Cited
GB678619A
Cited
US2552117A
Cited
US2816729A
Cited
US2695625A
Cited
US2772850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |