US3616602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature purification of fluids
Assignee: Phillips Petroleum Co
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Filing: 1970-01-29
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Granted: 1971-11-02
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Expires: 1990-01-29
Abstract
Abstract AN ABSORPTION METHOD OF PURIFYING LIQUID OR GAS STREAMS WHICH EMPLOYS A TEMPERATURE AT OR BELOW THE FREEZING POINT OF THE CONSITUENTS TO BE ABSORPTIVELY REMOVED FROM THE STREAM. OPERATING AT OR BELOW SUCH TEMPERATURE GREATLY INCREASES THE ABSORPTION CAPACITY OF THE ABSORPTIVE MATERIAL.
Inventors
- 👤 George E Hays
- 👤 Melvin A Albright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:39
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; B; B01; B01D; B01D15/00; B01D53/00; B01D53/02; B01D53/04; C01; C01B; C01B23/00; C07C7/13; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/104; B01D2253/106; B01D2256/00; B01D2256/10; B01D2256/12; B01D2256/18; B01D2256/24; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40086; B01D2259/40088; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/908
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |