US3409480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat treating silicon steel sheet
Assignee: General Electric Co
•
Filing: 1965-01-07
•
Granted: 1968-11-05
•
Expires: 1985-01-07
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Forslund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:12
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/68; C22; C22C; C22C38/00; C22C38/02; F; F27; F27B; F27B9/00; F27B9/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2986485A
Cited
US2965526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |