US3538281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed-gas circuit interrupter with cylindrical high pressure tank supporting a spherical exhaust tank
Assignee: Westinghouse Electric Corp
•
Filing: 1966-12-02
•
Granted: 1970-11-03
•
Expires: 1986-12-02
Abstract
No abstract record available.
Inventors
- 👤 Winthrop M Leeds
- 👤 Albert P Strom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:34
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/53; H01H33/56; H01H33/008; H01H33/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1957982A
Cited
US1957983A
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US2079231A
Cited
US2581571A
Cited
US3052783A
Cited
US3189718A
Cited
US3350528A
Cited
US3358104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |