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:
Apr. 13, 1993
Filed:
Jan. 18, 1991
Robert D Seizert, Brooklyn, MI (US);
Mark Nulman, Birmingham, MI (US);
Glenn T VanVolkom, Fairless Hills, PA (US);
Solvay Automotive, Inc., Houston, TX (US);
Abstract
A process for treating a container comprised of a normally solid, polymer surface with a sulfur-containing compound is carried out by contacting the surface at a temperature of about 120.degree. to about 140.degree. F. with a sulfur-containing compound. Subsequently, the surface is contacted with a neutralizing agent. The process is conducted for a such a period of time and with such concentrations of the sulfur-containing compound and the neutralizing agent that the container has average permeability to unleaded gasoline having octane number of 93 of not greater than about 0.021 g/hr. The surface, after the treatment, comprises about 700 to about 1800 micrograms of sulfur per square inch of the surface and it is penetrated by the sulfur-containing compound to an average depth of at least about 15 microns.