US2552470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air circulator and heater
Assignee: Electrolux Corp
•
Filing: 1946-09-06
•
Granted: 1951-05-08
•
Expires: 1966-09-06
Abstract
No abstract record available.
Inventors
- 👤 Eric C Wahlberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:13
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24H3/0411; F24H3/0417; H; H02; H02K; H02K7/00; H02K7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE18240E
Cited
US745507A
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US1041322A
Cited
US1450589A
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US1528300A
Cited
US1566989A
Cited
US2004488A
Cited
US2111148A
Cited
US2429733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |