US2547865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid conductor heater
Assignee: Hankscraft Co
•
Filing: 1947-05-17
•
Granted: 1951-04-03
•
Expires: 1967-05-17
Abstract
No abstract record available.
Inventors
- 👤 Marshall W Hanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:31
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/101; F24H1/106; H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1782069A
Cited
US1806729A
Cited
US1685266A
Cited
US1994331A
Cited
US1977232A
Cited
US2140516A
Cited
US2429112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |