Patent US2672186A successfully refreshed from Google Patents.
US2672186A
Expired / Lapsed
US
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Automatic gas burning torch and pilot light
Assignee: Smith Welding Equipment Corp
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Filing: 1949-09-14
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Granted: 1954-03-16
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Expires: 1969-09-14
Abstract
No abstract record available.
Inventors
- 👤 Elmer H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:51
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/465; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86381
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |