Patent US2902587A successfully refreshed from Google Patents.
US2902587A
Expired / Lapsed
US
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Arc welding process and apparatus
Assignee: Chemetron Corp
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Filing: 1955-04-29
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Granted: 1959-09-01
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Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:20
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/32; B23K9/325; B23K9/16; B23K9/173
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711151A
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US1589017A
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US1501266A
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US1552369A
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US1531828A
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US1629748A
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US2350387A
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US2644070A
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US2504867A
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US2544711A
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US2694764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |