Patent US1987683A successfully refreshed from Google Patents.
US1987683A
Expired / Lapsed
US
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Insulator
Assignee: Westinghouse Electric Corp
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Filing: 1931-07-03
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Granted: 1935-01-15
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Expires: 1951-07-03
Abstract
No abstract record available.
Inventors
- 👤 Marsden H Hunt
- 👤 George M Barrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:01
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B33/00; C04B33/24; C04B33/26; C04B41/45; C04B41/50; C04B41/5022; C04B41/52; C04B41/80; C04B41/81; C04B41/85; C04B41/86; C04B41/89; H; H01; H01B; H01B17/00; H01B17/50
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) | 1938-01-14 | 1938-07-16 | 1939-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-14 | 1942-07-16 | 1943-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-14 | 1946-07-16 | 1947-01-15 | $7700.00 | Window Closed / Lapsed |