US2254757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making torch tips
Assignee: Smith Welding Equipment Corp
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Filing: 1939-07-03
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Granted: 1941-09-02
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Expires: 1959-07-03
Abstract
No abstract record available.
Inventors
- 👤 Elmer H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
B; B21; B21K; B21K21/00; B21K21/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49348
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-09-01 | 1945-03-03 | 1945-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-01 | 1949-03-03 | 1949-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-01 | 1953-03-03 | 1953-09-02 | $7700.00 | Window Closed / Lapsed |