US2679202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air circulator
Assignee: Individual
•
Filing: 1951-05-17
•
Granted: 1954-05-25
•
Expires: 1971-05-17
Abstract
No abstract record available.
Inventors
- 👤 Koff Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:50
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/003; F24F8/00; F24F8/10; F24F8/108; F24H; F24H3/00; F24H3/02; F24H3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2093349A
Cited
US2032692A
Cited
US2284161A
Cited
US2282015A
Cited
GB599956A
Cited
US2607281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |