US3543006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating system
Assignee: Electrolux AB
•
Filing: 1967-12-01
•
Granted: 1970-11-24
•
Expires: 1987-12-01
Abstract
No abstract record available.
Inventors
- 👤 Leif Gosta Fjellstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:30
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1902; G05D23/1904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2819371A
Cited
US2840679A
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US2879368A
Cited
US2963566A
Cited
US3023294A
Cited
US3003048A
Cited
US3159755A
Cited
US3431399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |