US2689293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drawout switchgear apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1951-02-08
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Granted: 1954-09-14
•
Expires: 1971-02-08
Abstract
No abstract record available.
Inventors
- 👤 Glen L Claybourn
- 👤 Arthur L Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
H; H02; H02B; H02B11/00; H02B11/24; H02B11/12; H02B11/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US783377A
Cited
US2157154A
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US2151756A
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US2209057A
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US2345007A
Cited
US2443669A
Cited
US2504876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |