Patent US2497549A successfully refreshed from Google Patents.
US2497549A
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Fluid control system
Assignee: GASAIR Corp
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Filing: 1946-10-29
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Granted: 1950-02-14
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Expires: 1966-10-29
Abstract
No abstract record available.
Inventors
- 👤 John K Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:47
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/46; F17; F17C; F17C7/00; F17C7/02; F17C7/04; G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D9/00; G05D9/04; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0311; F17C2205/0317; F17C2205/0323; F17C2205/0329; F17C2205/0332; F17C2205/0335; F17C2227/00; F17C2227/03; F17C2227/0302; F17C2227/0332; F17C2227/0367; F17C2227/0388; F17C2227/0393; F17C2250/00; F17C2250/06; F17C2250/0605; F17C2250/0636; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1804; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/7287; Y10T137/7358; Y10T137/742; Y10T137/7439; Y10T137/7722; Y10T137/7723; Y10T137/7726; Y10T137/7727; Y10T137/7758; Y10T137/7762; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/8593; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US731191A
Cited
US2094908A
Cited
CH181622A
Cited
US2234407A
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US2329750A
Cited
US2346112A
Cited
US2319819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |