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US4600518A
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Choline for neutralizing naphthenic acid in fuel and lubricating oils
Assignee: Nalco Exxon Energy Chemicals LP
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Filing: 1985-07-15
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Granted: 1986-07-15
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Expires: 2005-07-15
Abstract
Abstract Choline is an effective agent for neutralizing naphthenic acids found in certain fuel and lubricating oils.
Inventors
- 👤 Donald G. Ries
- 👤 Glenn L. Roof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:58
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225; C10G; C10G29/00; C10G29/20; C10M; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/08; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
33 words
A method of neutralizing at least a portion of the naphthenic acids present in fuel and lubricating oils which contain naphthenic acids which comprises treating these oils with a neutralizing amount of choline.
Claim 2
Independent Claim
33 words
A method of neutralizing at least a portion of the naphthenic acids present in fuel and lubricating oils which contain naphthenic acids which comprises treating these oils with a neutralizing amount of choline.
Claim 3
Dependent Claim
17 words
The method of claim 1 where the choline is used with an anti-haze additive or water-in-oil demulsifier.
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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |