US2477791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulation for electrical apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1943-04-17
•
Granted: 1949-08-02
•
Expires: 1963-04-17
Abstract
No abstract record available.
Inventors
- 👤 Newton C Foster
- 👤 Lawrence R Hill
- 👤 Robert H Runk
- 👤 Earl L Schulman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:06
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1857586A
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US1984911A
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US1971219A
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US2255313A
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US2258423A
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US2319780A
Cited
US2320866A
Cited
US2319826A
Cited
US2363324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |