Patent US1968549A successfully refreshed from Google Patents.
US1968549A
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Liquid heater
Assignee: EDISON GENERAL ELEC APPLIANCE
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Filing: 1931-04-07
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Granted: 1934-07-31
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Expires: 1951-04-07
Abstract
No abstract record available.
Inventors
- 👤 Clyde E Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:06
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2014; F24H9/2021; F24H15/00; F24H15/10; F24H15/174; F24H15/175; F24H15/20; F24H15/212; F24H15/223; F24H15/225; F24H15/30; F24H15/355; F24H15/37; F24H15/40; F24H15/407
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-07-30 | 1938-01-29 | 1938-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-30 | 1942-01-29 | 1942-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-30 | 1946-01-29 | 1946-07-31 | $7700.00 | Window Closed / Lapsed |