Patent US2444794A successfully refreshed from Google Patents.
US2534489A
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Automatic sampler of liquid and gas phase streams
Assignee: Phillips Petroleum Co
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Filing: 1945-07-02
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Granted: 1950-12-19
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Expires: 1965-07-02
Abstract
No abstract record available.
Inventors
- 👤 Ludwig A Webber
- 👤 Otta W Kiphart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/28; G01N1/40; G01N1/4077; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405
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) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |