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. 17, 1977
Filed:
May. 30, 1975
Charles Pigerol, Saint-Ouen, FR;
Marie-Madeleine Chandavoine, Sisteron, FR;
Paul de DE Fillain, Sisteron, FR;
Souli Nanthavong, Grenoble, FR;
Labaz, Paris, FR;
Abstract
New stabilizers of polymers and co-polymers of vinyl chloride, the said stabilizers being 2-phenyl-indole derivatives corresponding to the formula: ##STR1## wherein R.sub.1 and R.sub.2, which are the same or different, each represent a branched- or straight-chain alkyl group containing from 1 to 12 carbon atoms, a cyclohexyl radical, a branched- or straight-chain alkyloxy group containing from 1 to 12 carbon atoms, a benzyloxy radical, a hydroxy radical or R.sub.1 and R.sub.2 represent together an alkylenedioxy radical containing from 1 to 3 carbon atoms, R.sub.3 represents a hydrogen atom, a methyl or methoxy radical, with the proviso that one at least of the substituents R.sub.1 or R.sub.2 does not represent an alkyl radical.