US2578074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding machine
Assignee: ARTHUR E ZUCKERMAN
•
Filing: 1950-07-25
•
Granted: 1951-12-11
•
Expires: 1970-07-25
Abstract
No abstract record available.
Inventors
- 👤 Kershaw Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/002; B23K11/004; B23K11/0046; B23K11/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1061378A
Cited
US1370511A
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US1490191A
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US1548397A
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US2154243A
Cited
GB544047A
Cited
US2299543A
Cited
US2308658A
Cited
US2308659A
Cited
US2355576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |