Patent US2765144A successfully refreshed from Google Patents.
US2765144A
Expired / Lapsed
US
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Valve for gas arc welding apparatus
Assignee: Airco Inc
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Filing: 1952-11-08
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Granted: 1956-10-02
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Expires: 1972-11-08
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Layden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:41
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/24; B23K9/28; B23K9/29; B23K9/291; F; F23; F23D; F23D14/00; F23D14/46; F23D14/465
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1418592A
Cited
US2149584A
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US2310164A
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US2376265A
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US2444767A
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US2525615A
Cited
US2512281A
Cited
US2572658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |