US2674403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid control damper
Assignee: PRAT DANIEL CORP
•
Filing: 1951-08-23
•
Granted: 1954-04-06
•
Expires: 1971-08-23
Abstract
No abstract record available.
Inventors
- 👤 Louis C Whiton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:53
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/462; F04D29/464; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/51; F05D2260/00; F05D2260/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB189320861A
Cited
US1167320A
Cited
US1550120A
Cited
FR648838A
Cited
US1858071A
Cited
US2405282A
Cited
US2373166A
Cited
US2443263A
Cited
US2435092A
Cited
US2421877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |