Patent US2763755A successfully refreshed from Google Patents.
US2763755A
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US
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Electric arc welding
Assignee: Graham Manufacturing Corp
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Filing: 1952-09-27
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Granted: 1956-09-18
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Expires: 1972-09-27
Abstract
No abstract record available.
Inventors
- 👤 Harold J Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:17
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/20; B23K9/201; B23K9/202; B23K9/06; B23K9/073; B23K9/0738
Claims Analysis
Total Claims: 0
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US2485357A
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US2491479A
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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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |