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:
May. 01, 1990
Filed:
Mar. 01, 1988
Bernhard Seubert, Edingen-Neckarhausen, DE;
Helmut Beilharz, Schriesheim, DE;
Werner Fickert, Mannheim, DE;
Gunter Jeromin, Heidelberg, DE;
Ulrich Spitaler, Freinsheim, DE;
Rutgerswerke AG, , DE;
Abstract
The invention relates to a synthetic preparation of alkali metal salts of low molecular weight humic acids wherein multi-valent phenols are oxidized in a weakly alkaline aqueous medium at a temperature in the range of 15.degree. to 40.degree. C. Subsequently, the reaction mixture is adjusted to a pH value ranging between 6.2 and 7.2 and/or buffered. The low molecular alkali metal huminate is then purified through purification means including preparatory chromotography, ultra-filtration, ultra-centrifugation, or electrodialysis and separated from undesirable by-products.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile