US2754397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple plate work coil with offset edges for induction heating
Assignee: Allis Chalmers Corp
•
Filing: 1953-05-22
•
Granted: 1956-07-10
•
Expires: 1973-05-22
Abstract
No abstract record available.
Inventors
- 👤 William B Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:48
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2271916A
Cited
US2408229A
Cited
US2394944A
Cited
US2481071A
Cited
US2689296A
Cited
GB684495A
Cited
US2643325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |