Patent US2905198A successfully refreshed from Google Patents.
US2905198A
Expired / Lapsed
US
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Air flow control valve
Assignee: DeVilbiss Co
•
Filing: 1955-07-19
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Granted: 1959-09-22
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Expires: 1975-07-19
Abstract
No abstract record available.
Inventors
- 👤 Donald J Peeps
- 👤 Joy B Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:48
CPC Classifications
F; F16; F16K; F16K21/00; F16K21/04; A; A61; A61C; A61C17/00; A61C17/02; A61C17/022; A61M; A61M11/00; F16K24/00; F16K24/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1163471A
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US1279087A
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US1599998A
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US1541794A
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US1890494A
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US2564286A
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US2659385A
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US2793653A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |