Patent US2674403A successfully refreshed from Google Patents.
US2674403A
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Fluid control damper
Assignee: PRAT DANIEL CORP
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Filing: 1951-08-23
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Granted: 1954-04-06
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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 21:04
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
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References Cited (Backward Citations)
GB189320861A
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US1167320A
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US1550120A
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FR648838A
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US1858071A
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US2405282A
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US2373166A
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US2443263A
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US2435092A
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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 |