US2737875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air outlet device for ventilating apparatus
Assignee: Anemostat Corp of America
•
Filing: 1951-07-23
•
Granted: 1956-03-13
•
Expires: 1971-07-23
Abstract
No abstract record available.
Inventors
- 👤 Franz J Kurth
- 👤 Leonard R Phillips
- 👤 William J Waeldner
- 👤 George R Wallen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:33
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/062; F24F1/00; F24F1/01; F24F11/00; F24F11/89; F24F13/26; F24F2221/00; F24F2221/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2413937A
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US2541280A
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FR968359A
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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) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |