US2821614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical steam generator and method of steam generation
Assignee: CARBON HEATER Corp
•
Filing: 1955-07-22
•
Granted: 1958-01-28
•
Expires: 1975-07-22
Abstract
No abstract record available.
Inventors
- 👤 Jansons Janis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:50
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/28; F22B1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1597362A
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US2106019A
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US2185786A
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US2623980A
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US2556656A
Cited
US2611852A
Cited
US2612592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |