Patent US2685300A successfully refreshed from Google Patents.
US2685300A
Expired / Lapsed
US
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Valve control
Assignee: National Welding Equipment Co
•
Filing: 1948-12-09
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Granted: 1954-08-03
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Expires: 1968-12-09
Abstract
No abstract record available.
Inventors
- 👤 Hammon George Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:41
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/0402; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7795
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US460075A
Cited
US1069876A
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US1802002A
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US1626581A
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US1745785A
Cited
US1944428A
Cited
US2057150A
Cited
US2540371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |