US2640180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1948-04-02
•
Granted: 1953-05-26
•
Expires: 1968-04-02
Abstract
No abstract record available.
Inventors
- 👤 John R Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:42
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/248
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1830232A
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US2295601A
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US2404918A
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US2307447A
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US2356859A
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US2385214A
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US2402432A
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US2431083A
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US2464287A
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US2472507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |