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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.:

US 5030244 B1

PDFFull Text
Date of Patent:
Jul. 09, 1991

Filed:

Jun. 02, 1989

Preparation of granules of dyes, optical whiteners or photoactivators

Applicant:
Inventors:

Konrad Neumann, Rheinfelden, DE;

Angelika Hayer, Riehen, CH;

Wolfgang Rehmann, Basel, CH;

Horst O Brucker, Rheinfelden, DE;

Assignee:

Ciba-Geigy Corporation, Ardsley, NY (US);

Attorneys:

Dohmann; George R.

Roberts; Edward McC.

Primary Examiner:

A Lionel Clingman

Int. Cl.
CPC ...
B01D / ; C09B / ; C11D / ; D06L / ;
U.S. Cl.
CPC ...
8526 ; 8543 ; 8654 ; 8661 ; 8673 ; 8675 ; 8680 ; 8685 ; 8687 ; 2331 / ; 106316 ; 106401 ; 106902 ; 25230121 ; 540139 ; 540140 ;
Abstract

Process for the preparation of granules by spray-drying of an aqueous suspension having a solids content of greater than/equal to 30% and containing at least one dye, fluorescent brightener or photoactivator and one condensation product from naphthalenesulfonic acid and formaldehyde and, if necessary, further auxiliaries and/or diluents. The spray-drying is carried out at a feed pressure of 50-150 bar, the residual moisture content of the product is less than 4%, and the granules obtained are in particular very pressure resistant and abrasion resistant.

Find Patent Forward Citations

Neumann, Konrad. (1991). Preparation of granules of dyes, optical whiteners or photoactivators (U.S. Patent No. 5030244). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5030244

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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