US2673708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure sealed butterfly valve
Assignee: Individual
•
Filing: 1950-09-28
•
Granted: 1954-03-30
•
Expires: 1970-09-28
Abstract
No abstract record available.
Inventors
- 👤 Alfred C Danks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:09
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/228
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1598564A
Cited
US1834870A
Cited
US1834988A
Cited
US1813126A
Cited
US1844641A
Cited
US1990309A
Cited
US2054369A
Cited
US2059656A
Cited
US2488380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |