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Patent US2903567A successfully refreshed from Google Patents.
US2903567A
Expired / Lapsed
US
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Arc welding apparatus
Assignee: AO Smith Corp
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Filing: 1956-12-31
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Granted: 1959-09-08
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Julian A Piekarski
- 👤 John A Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:37
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/29; B23K9/291; B23K9/295
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1128116A
Cited
US2333192A
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US2440696A
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US2673278A
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US2510415A
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US2727970A
Cited
US2719899A
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US2761049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |