US2444508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater for flowing fluid
Assignee: Individual
•
Filing: 1945-10-29
•
Granted: 1948-07-06
•
Expires: 1965-10-29
Abstract
No abstract record available.
Inventors
- 👤 Paul P Horni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:02
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US957667A
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US1191743A
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US1707322A
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US1764139A
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US1920284A
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US1847198A
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FR718051A
Cited
US1916064A
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US1967011A
Cited
US1957070A
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US1952107A
Cited
GB496155A
Cited
US2355687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |