Patent US2665054A successfully refreshed from Google Patents.
US2665054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replaceable blade fan
Assignee: Joy Manufacturing Co
•
Filing: 1948-01-07
•
Granted: 1954-01-05
•
Expires: 1968-01-07
Abstract
No abstract record available.
Inventors
- 👤 Hans F Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:31
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F04D29/362
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US974496A
Cited
US1455990A
Cited
US1878816A
Cited
US2232670A
Cited
US2373108A
Cited
US2342421A
Cited
US2324650A
Cited
US2515996A
Cited
US2351645A
Cited
US2412615A
Cited
US2517714A
Cited
US2445154A
Cited
US2495433A
Cited
US2495434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |