Patent US2221564A successfully refreshed from Google Patents.
US2221564A
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US
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Safety control device for gas governors
Assignee: Individual
•
Filing: 1939-06-03
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Granted: 1940-11-12
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Expires: 1959-06-03
Abstract
No abstract record available.
Inventors
- 👤 George H Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:15
CPC Classifications
F; F16; F16K; F16K17/00; Y; Y10; Y10T; Y10T137/00; Y10T137/4456; Y10T137/4643; Y10T137/4651; Y10T137/7722; Y10T137/7723; Y10T137/7728; Y10T137/7758; Y10T137/7762; Y10T137/7781; Y10T137/7793; Y10T137/7809; Y10T137/782; Y10T137/7831
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) | 1943-11-12 | 1944-05-13 | 1944-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-12 | 1948-05-13 | 1948-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-12 | 1952-05-13 | 1952-11-12 | $7700.00 | Window Closed / Lapsed |