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:
Sep. 13, 1994
Filed:
Apr. 20, 1992
Applicant:
Inventors:
Georg Pawlowski, Wiesbaden, DE;
Ralph Dammel, Coventry, RI (US);
Horst Roeschert, Ober-Hilbersheim, DE;
Walter Spiess, Dieburg, DE;
Charlotte Eckes, Mainz, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; G03F / ; G03F / ;
U.S. Cl.
CPC ...
430284 ; 430176 ; 430270 ; 430286 ; 430292 ; 430300 ; 430302 ; 430323 ; 430326 ; 430914 ; 430919 ; 430925 ;
Abstract
Ligomeric sulfonic acid derivatives having repeating units of the formula I ##STR1## in which R.sup.1 is an alkyl, haloalkyl or aryl radical,