US2663494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric fan
Assignee: EARL HAUBRICH
•
Filing: 1950-09-06
•
Granted: 1953-12-22
•
Expires: 1970-09-06
Abstract
No abstract record available.
Inventors
- 👤 Carl J Burkland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:16
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F04D29/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1278396A
Cited
US1779050A
Cited
US1887045A
Cited
US2150129A
Cited
US2478244A
Cited
US2514097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |