Patent US2490420A successfully refreshed from Google Patents.
US2490420A
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US
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Gas control means
Assignee: AFFILLATED GAS EQUIPMENT Inc
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Filing: 1948-02-10
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Granted: 1949-12-06
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Expires: 1968-02-10
Abstract
No abstract record available.
Inventors
- 👤 Keith T Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:44
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/1919; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2377517A
Cited
US2164511A
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US2158787A
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US2244555A
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US2328279A
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US2282755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |