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:
Jan. 06, 1976
Filed:
Dec. 03, 1974
Harry F Kohne, Jr, Glenwood, MD (US);
Frederick L Kurrle, Laurel, MD (US);
Westvaco Corporation, New York, NY (US);
Abstract
A blushed and opaque pigment consisting essentially of spherical particles having a high optical efficiency and an average particle diameter in the range of from about 0.1 to 0.2 micron is produced from a polystyrene containing latex emulsion. The blushed and opaque particles have an air containing microporous structure as a result of air-solid interfaces within the pigment particles, which interfaces are created when the particles are penetrated and swollen by a swelling agent for the particle material and then the swelling agent is removed to set the particles in their swollen and blushed state.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile