US3541304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric fluid heater
Assignee: Individual
•
Filing: 1968-03-18
•
Granted: 1970-11-17
•
Expires: 1988-03-18
Abstract
No abstract record available.
Inventors
- 👤 Diter Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:46
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24H1/00; F24H1/10; F24H1/12; F24H1/121; F24H9/00; F24H9/18; F24H9/1854; F24H9/1863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1420692A
Cited
US1712372A
Cited
US1845050A
Cited
US1727585A
Cited
GB673305A
Cited
US2619579A
Cited
US2797297A
Cited
US2861873A
Cited
US2868944A
Cited
FR1293413A
Cited
US3270182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |