US2997057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve structure having readily removable plug and seat structures
Assignee: General Controls Co
•
Filing: 1957-02-28
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Granted: 1961-08-22
•
Expires: 1977-02-28
Abstract
No abstract record available.
Inventors
- 👤 Louis R Toth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:43
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/04; F16K5/0457; F16K5/0471; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6031; Y10T137/6035; Y10T137/6038; Y10T137/6041; Y10T137/6058; Y10T137/7504; Y10T137/8593; Y10T137/87917; Y10T137/87981
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE370700C
Cited
US719528A
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US851338A
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US1019590A
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US1086221A
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US1226175A
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US2230434A
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GB691430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |