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:
Dec. 29, 1992
Filed:
May. 14, 1992
Klaus Raab, Burgkirchen, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Mixtures of perfluorinated alkyl bromides or alkylene dibromides containing perfluorinated iodine compounds are irradiated with electromagnetic radiation in the wavelength range from 230 to 500 nm and brought into contact, either during the irradiation or directly thereafter, with at least one of the following agents: active charcoal, certain finely divided metals, lower aliphatic alcohols, chlorine, bromine, oxygen, hydrogen peroxide, aqueous or alcoholic solutions of alkali metal compounds with certain inorganic anions or lower aliphatic alcohols. After removal of the agent and if appropriate distillation, products which contain less than 0.0005% by weight of iodine compounds and can be employed, for example, in the medical sector can be obtained.