US3068339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersible electric heater
Assignee: Individual
•
Filing: 1960-09-12
•
Granted: 1962-12-11
•
Expires: 1980-09-12
Abstract
No abstract record available.
Inventors
- 👤 Kay Robert De
- 👤 Charles E Chorjel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:26
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78; E; E21; E21B; E21B36/00; E21B36/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1264119A
Cited
US1407918A
Cited
US2018293A
Cited
US1839632A
Cited
US2469287A
Cited
US2781851A
Cited
US2754912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |