Patent US3534386A successfully refreshed from Google Patents.
US3534386A
Expired / Lapsed
US
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Electron beam welding
Assignee: Welding Institute England
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Filing: 1968-04-23
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Granted: 1970-10-13
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Expires: 1988-04-23
Abstract
No abstract record available.
Inventors
- 👤 Peter A Mercer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:16
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/21; B; B23; B23K; B23K15/00; B23K15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3140379A
Cited
US3207982A
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US3268812A
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US3146335A
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US3148265A
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US3371274A
Cited
US3326176A
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US3408474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |