US3011093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surge suppressor for welder
Assignee: Westinghouse Electric Corp
•
Filing: 1959-12-18
•
Granted: 1961-11-28
•
Expires: 1979-12-18
Abstract
No abstract record available.
Inventors
- 👤 Alec H B Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:26
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/062; B; B23; B23K; B23K9/00; B23K9/10; B23K9/1006; B23K9/1012; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/1203; H02H7/1206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1357257A
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US2011395A
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US2213091A
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US2200233A
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US2275881A
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US2294863A
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US2637769A
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US2752529A
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US2800571A
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US2763811A
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US2786160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |