US3406269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-blast circuit breakers having means for increasing the density of the fluid during interruption
Assignee: Westinghouse Electric Corp
•
Filing: 1965-02-26
•
Granted: 1968-10-15
•
Expires: 1985-02-26
Abstract
No abstract record available.
Inventors
- 👤 William H Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:48
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/02; H01H33/04; H01H33/22; H01H33/88; H01H33/90; H01H33/91; H01H33/98; H01H2033/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE703744C
Cited
DE638145C
Cited
DE679327C
Cited
GB475370A
Cited
GB609589A
Cited
US2757261A
Cited
US3150245A
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US3257533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |