Patent US2807144A successfully refreshed from Google Patents.
US2807144A
Expired / Lapsed
US
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Flow regulator for liquefied gases
Assignee: Weatherhead Co
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Filing: 1953-09-21
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Granted: 1957-09-24
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Expires: 1973-09-21
Abstract
No abstract record available.
Inventors
- 👤 Clair Theodore A St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:34
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/02; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0335; F17C2205/0338; F17C2205/0382; F17C2205/0385; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/03; F17C2223/033; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/043; F17C2250/0434; F17C2250/0443; F17C2250/06; F17C2250/0605; F17C2250/0626; F17C2250/0636; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/7793; Y10T137/7796; Y10T137/8593; Y10T137/87917; Y10T137/88054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |