US2823331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc welding apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1954-10-29
•
Granted: 1958-02-11
•
Expires: 1974-10-29
Abstract
No abstract record available.
Inventors
- 👤 Harry J Bichsel
- 👤 Alfred J Baeslack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:51
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/124; B23K9/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1287774A
Cited
US1508738A
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US1502489A
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US1809625A
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US1535883A
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US1944756A
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US2175547A
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US2179569A
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US2101802A
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US2145010A
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US2080496A
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US2223177A
Cited
US2264333A
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US2282522A
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US2331123A
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US2322218A
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US2312117A
Cited
US2445789A
Cited
US2421632A
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US2552206A
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US2635165A
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US2636102A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |