US1949379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating and air treating apparatus
Assignee: CAMPBELL METAL WINDOW Corp
•
Filing: 1932-05-10
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Granted: 1934-02-27
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Expires: 1952-05-10
Abstract
No abstract record available.
Inventors
- 👤 Sargent Allston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0233; F28D1/024; F24; F24F; F24F1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-02-26 | 1937-08-28 | 1938-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-26 | 1941-08-28 | 1942-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-26 | 1945-08-28 | 1946-02-27 | $7700.00 | Window Closed / Lapsed |