Patent US1775981A successfully refreshed from Google Patents.
US1775981A
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Process for forming magnetic elements
Assignee: Warner Electric Brake Corp
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Filing: 1929-01-11
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Granted: 1930-09-16
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Expires: 1949-01-11
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:21
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F3/00; H01F3/10; H01F3/14; H01F41/0253; Y; Y10; Y10S; Y10S29/00; Y10S29/039; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/49885; Y10T29/49945
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) | 1933-09-15 | 1934-03-17 | 1934-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-09-15 | 1938-03-17 | 1938-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-09-15 | 1942-03-17 | 1942-09-16 | $7700.00 | Window Closed / Lapsed |