US2706241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater
Assignee: Individual
•
Filing: 1953-12-11
•
Granted: 1955-04-12
•
Expires: 1973-12-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred P Granger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:09
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24H3/0411; F24H3/0417
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US516878A
Cited
US1995886A
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US1231056A
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US1484156A
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US2093419A
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US2274469A
Cited
US2456781A
Cited
US2408286A
Cited
US2492248A
Cited
US2475113A
Cited
US2619578A
Cited
US2521654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |