The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 1978
Filed:
Jan. 10, 1977
Karlheinz Koch, Haan, DT;
Horst Rutzen, Langenfeld, DT;
Henkel KGaA, Dusseldorf, DT;
Durtsche Gold- und Silber-Scheideanstalt vormals Roessler, Frankfurt am Main, DT;
Abstract
The reaction of an aminoalkanol of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are C.sub.1-17 aliphatic hydrocarbon groups (the sum of the carbon atoms in R.sup.1 + R.sup.2 being from 9 to 18); R.sup.3 and R.sup.4 represent the same or different C.sub.1-6 alkyl or alkylol groups; x represents a integer from 2 to 4; and y represents 0 or 1, with a water-soluble halocarboxylic acid provides quaternary ammonium compounds. The compounds are amphoteric surface-active agents which are soluble in water containing high concentrations of NaCl, and are useful in the recovery of underground petroleum by the flooding method.