US2159057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen-cooled machine with gland seals
Assignee: Westinghouse Electric Corp
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Filing: 1938-05-26
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Granted: 1939-05-23
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Expires: 1958-05-26
Abstract
No abstract record available.
Inventors
- 👤 Charles C Sterrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:27
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/124; Y; Y10; Y10S; Y10S277/00; Y10S277/918; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/957; Y10S411/959; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2842; Y10T137/2863; Y10T137/4456
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) | 1942-05-22 | 1942-11-21 | 1943-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-22 | 1946-11-21 | 1947-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-22 | 1950-11-21 | 1951-05-23 | $7700.00 | Window Closed / Lapsed |