US2654820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric immersion heater
Assignee: Thermal Syndicate Ltd
•
Filing: 1950-05-26
•
Granted: 1953-10-06
•
Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
- 👤 Irving Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE569062C
Cited
US1365978A
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US1472197A
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US1459307A
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US1809089A
Cited
US1952445A
Cited
US1922029A
Cited
US2088586A
Cited
US2549211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |