Dispersants and process for their preparation
Patent 3980569 Issued on September 14, 1976. Estimated Expiration Date: 
September 14, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 14, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2962442 3737465 InventorsAssigneeApplicationNo. 05/540470 filed on 01/13/1975US Classes:508/542, Compound of indeterminate structure, prepared by reacting an aldehyde, a phenol or phenol salt, and ammonia or substituted ammonia (e.g., reaction of formaldehyde, phenol, and amine, etc.)44/415, Compound of indeterminate structure prepared by reacting a phenol, an aldehyde, and ammonia or substituted ammonia44/424Benzene ring attached indirectly to the nitrogen by acyclic nonionic bondingExaminersPrimary: Gantz, Delbert E.Assistant: Vaughn, I. Attorney, Agent or FirmInternational ClassesC10L 1/22 (20060101)C10M 159/00 (20060101) C10M 159/16 (20060101) B01F 17/00 (20060101) C08G 14/00 (20060101) C08G 14/06 (20060101) C10L 1/10 (20060101) AbstractCompositions useful as lubricant and fuel dispersants are prepared by reacting a hydroxyaromatic compound containing an aliphatic or alicyclic substituent which has at least about 6 carbon atoms with an aldehyde in the presence of an alkaline reagent and at a temperature up to about 125°C., substantially neutralizing the resulting intermediate at a temperature up to about 150°C., and then reacting with a primary or secondary amino compound. | |
