Patent US2519939A successfully refreshed from Google Patents.
US2519939A
Expired / Lapsed
US
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Cutting torch
Assignee: Smith Welding Equipment Corp
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Filing: 1945-11-23
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Granted: 1950-08-22
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Expires: 1965-11-23
Abstract
No abstract record available.
Inventors
- 👤 Elmer H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:29
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/465
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1194769A
Cited
FR616179A
Cited
US1553709A
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US1926438A
Cited
US2059706A
Cited
US1992851A
Cited
US2176813A
Cited
US2355849A
Cited
US2417650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |