US2796889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow control valves
Assignee: Normalair Ltd
•
Filing: 1953-03-23
•
Granted: 1957-06-25
•
Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Treganowan Bernard Eric
- 👤 Stephens Ronald John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:10
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02; B64D13/04; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; G05D7/0133; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US780986A
Cited
US1050646A
Cited
US1645624A
Cited
US1944088A
Cited
US2179144A
Cited
US2255324A
Cited
US2484850A
Cited
US2647531A
Cited
US2618125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |