US2446932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding apparatus
Assignee: Individual
•
Filing: 1943-03-27
•
Granted: 1948-08-10
•
Expires: 1963-03-27
Abstract
No abstract record available.
Inventors
- 👤 Fred H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:46
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/3009; B23K11/3018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189815555A
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US1058677A
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US1256951A
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US1784384A
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US1792688A
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US2138388A
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US2250645A
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US2293523A
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US2271119A
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US2315854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |