US2837625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid conductor heater
Assignee: Hankscraft Co
•
Filing: 1956-08-09
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Granted: 1958-06-03
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Expires: 1976-08-09
Abstract
No abstract record available.
Inventors
- 👤 James R Conlin
- 👤 Schulz William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:33
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/201; F24H1/203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |