US2961152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable fan unit and window adapter
Assignee: Murray Ohio Manufacturing Co
•
Filing: 1955-12-09
•
Granted: 1960-11-22
•
Expires: 1975-12-09
Abstract
No abstract record available.
Inventors
- 👤 Alvin P Douglas
- 👤 Gilbert B Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:20
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/12; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646; F24; F24F; F24F7/00; F24F7/007; F24F7/013
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1935179A
Cited
US1917327A
Cited
US2622793A
Cited
US2644390A
Cited
US2755015A
Cited
US2846936A
Cited
US2862657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |