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US3546431A
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Immersion heater and method of making the same
Assignee: ERICH L GIBBS
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Filing: 1969-04-25
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Granted: 1970-12-08
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Expires: 1989-04-25
Abstract
No abstract record available.
Inventors
- 👤 Erich L Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:00
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78; H05B3/82; H05B3/0033; H05B3/0038; H05B3/0052; H05B3/40; H05B3/42; H05B3/44; H05B2203/00; H05B2203/021
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) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |