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. 08, 1980
Filed:
Jan. 30, 1978
William A Hoffman, III, Patterson, NJ (US);
Other;
Abstract
A multi-colored illuminated display device whereby colors are constantly changing due to small variations of temperature in the air moving about a contoured sheet of encapsulated cholesteric phase liquid crystal-coated polymeric film situated in a clear, colorless chimney. The rear interior surface of the chimney is coated to prevent the transmission of light therethrough, thus enhancing the reflected colors on the viewing faces. A source of heat and light such as a light bulb is used at the base. The heat rises by convection assisted by louvres or a small low speed fan may be installed. Many colorful designs may be achieved by varying the shape of the liquid crystal sheel and the range of heat temperatures used.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile