US3756943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Affinates of distillates method for improving the stability of hydrofinished distillates and r
Assignee: Standard Oil Co
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Filing: 1971-10-28
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Granted: 1973-09-04
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Expires: 1991-10-28
Abstract
Abstract THE METHOD COMPRISES ADDING AN INHIBITOR TO A HYDROFINISHED DISTILLATE OR A HYDROFINISHED RAFFINATE FROM A DISTILLATE PRIOR TO THE TIME THAT SAID DISTILLATE OR SAID RAFFINATE IS CONTACTED WITH AIR. THE INHIBITOR IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HINDERED PHENOLS, AMINES, AND METAL COMPLEXES OF MANNICH CONDENSATION PRODUCTS FROM PHENOLS, ALDEHYDES, AND POLYAMINES. IF THE DISTILLATE HAS BEEN HYDROFINISHED IN A TWO-STAGE PROCESS UNDER RELATIVELY SEVERE CONDITIONS, AN INHIBITOR MAY BE ADDED TO THE EFFLUENT FROM THE FIRST STAGE AND AN INHIBITOR MAY BE ADDED TO THE PRODUCT FROM THE SECOND STAGE.
Inventors
- 👤 P Hopkins
- 👤 R Menzl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:09
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10G; C10G45/00; C10G45/02; C10L1/18; C10L1/182; C10L1/183; C10L1/1832; C10L1/1835; C10L1/30; C10L1/301
Claims Analysis
Total Claims: 0
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |