US2113537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of rolling and treating silicon steel
Assignee: Heraeus Vacuumschmeise A G
•
Filing: 1936-07-02
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Granted: 1938-04-05
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Expires: 1956-07-02
Abstract
No abstract record available.
Inventors
- 👤 Hiemenz Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:31
CPC Classifications
C; C21; C21D; C21D8/00; C21D8/12; C21D8/1244; C21D8/1261; C21D8/1216; C21D8/1222; C21D8/1233; C21D8/1272; Y; Y10; Y10S; Y10S122/00; Y10S122/13
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) | 1941-04-04 | 1941-10-04 | 1942-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-04-04 | 1945-10-04 | 1946-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-04-04 | 1949-10-04 | 1950-04-05 | $7700.00 | Window Closed / Lapsed |