Patent US2201840A successfully refreshed from Google Patents.
US2201840A
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Method of treating asbestos
Assignee: Westinghouse Electric Corp
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Filing: 1938-02-17
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Granted: 1940-05-21
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Expires: 1958-02-17
Abstract
No abstract record available.
Inventors
- 👤 Venable Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:26
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/06; C; C04; C04B; C04B20/00; C04B20/10; C04B20/1055; C04B26/00; C04B26/02; C04B26/22; Y; Y10; Y10S; Y10S138/00; Y10S138/07; Y10S8/00; Y10S8/01; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652
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) | 1943-05-21 | 1943-11-20 | 1944-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-21 | 1947-11-20 | 1948-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-21 | 1951-11-20 | 1952-05-21 | $7700.00 | Window Closed / Lapsed |