US2000597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air distribution unit
Assignee: B F STURTEVANT Co Inc
•
Filing: 1934-01-17
•
Granted: 1935-05-07
•
Expires: 1954-01-17
Abstract
No abstract record available.
Inventors
- 👤 Robert E Keyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:29
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/01; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/80; F24F11/81
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) | 1938-05-06 | 1938-11-05 | 1939-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-06 | 1942-11-05 | 1943-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-06 | 1946-11-05 | 1947-05-07 | $7700.00 | Window Closed / Lapsed |