Patent US3518397A successfully refreshed from Google Patents.
US3518397A
Expired / Lapsed
US
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Apparatus for electroslag welding
Assignee: Hobart Brothers LLC
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Filing: 1968-06-20
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Granted: 1970-06-30
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Expires: 1988-06-20
Abstract
No abstract record available.
Inventors
- 👤 James R Hannahs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:56
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/0209; B23K25/00
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) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |