US2109512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulation system
Assignee: Carrier Corp
•
Filing: 1929-03-16
•
Granted: 1938-03-01
•
Expires: 1949-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Alfred E Stacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:58
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/30; F24F11/70; F24F11/72; F24F11/74; F24F11/75; F24F11/80; F24F11/83; F24F11/84
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) | 1941-02-28 | 1941-08-30 | 1942-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-02-28 | 1945-08-30 | 1946-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-02-28 | 1949-08-30 | 1950-03-01 | $7700.00 | Window Closed / Lapsed |