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US2199639A
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US
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Load limiting means for an electrical system
Assignee: Westinghouse Electric Corp
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Filing: 1938-11-12
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Granted: 1940-05-07
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Expires: 1958-11-12
Abstract
No abstract record available.
Inventors
- 👤 Paul R Lee
- 👤 Earl K Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:17
CPC Classifications
H; H01; H01H; H01H81/00; H01H81/02; H02; H02J; H02J3/00; H02J3/12; H02J3/14; H02J2105/00; H02J2105/50; H02J2105/52; H02J2105/54; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y02B70/3225; Y04; Y04S; Y04S20/00; Y04S20/20; Y04S20/222
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) | 1943-05-07 | 1943-11-06 | 1944-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-07 | 1947-11-06 | 1948-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-07 | 1951-11-06 | 1952-05-07 | $7700.00 | Window Closed / Lapsed |