US1924311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating material
Assignee: Westinghouse Electric Corp
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Filing: 1931-01-06
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Granted: 1933-08-29
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Expires: 1951-01-06
Abstract
No abstract record available.
Inventors
- 👤 Albert A Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:33
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/16; H01F1/18; C; C21; C21D; C21D1/00; C21D1/68; C21D1/70; C23; C23C; C23C24/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49078
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) | 1936-08-28 | 1937-02-27 | 1937-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-28 | 1941-02-27 | 1941-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-28 | 1945-02-27 | 1945-08-29 | $7700.00 | Window Closed / Lapsed |