Patent US2474531A successfully refreshed from Google Patents.
US2474531A
Expired / Lapsed
US
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Method of and apparatus for electrically welding studs to surfaces
Assignee: Linde Air Products Co
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Filing: 1944-04-07
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Granted: 1949-06-28
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Expires: 1964-04-07
Abstract
No abstract record available.
Inventors
- 👤 James M Keir
- 👤 Edwin A Clapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:14
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/20; B23K9/201; B23K9/202
Claims Analysis
Total Claims: 0
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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) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |