Patent US3536893A successfully refreshed from Google Patents.
US3536893A
Expired / Lapsed
US
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Immersion heater
Assignee: VINCENT J CRANLEY
•
Filing: 1968-09-24
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Granted: 1970-10-27
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Expires: 1988-09-24
Abstract
No abstract record available.
Inventors
- 👤 Vincent J Cranley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:22
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78; H05B3/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1178777A
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US1690986A
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US2297030A
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US2789201A
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US2785274A
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US2811629A
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US3440109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |