US1999446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transformer coupled induction heater
Assignee: Individual
•
Filing: 1933-10-06
•
Granted: 1935-04-30
•
Expires: 1953-10-06
Abstract
No abstract record available.
Inventors
- 👤 James K Delano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:20
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/105; H05B6/108; B; B24; B24B; B24B49/00; B24B49/10; B24B49/105; F; F22; F22B; F22B1/00; F22B1/28; F22B1/281; F22B1/282
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) | 1938-04-29 | 1938-10-29 | 1939-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-29 | 1942-10-29 | 1943-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-29 | 1946-10-29 | 1947-04-30 | $7700.00 | Window Closed / Lapsed |