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. 16, 1990
Filed:
Oct. 02, 1987
William F Dunn, Dallas, TX (US);
Other;
Abstract
Light admitting window coverings are provided with apertures which are formed in a covering such as a vertical blind louver. The louver is formed of opposed panel portions with a transparent film or sheet sandwiched therebetween to provide for sufficient light transmission and visibility through the louvers in the closed position but without permitting convective heat transmission through the window covering. The blind louvers may be formed with an insulating air space between the opposed louver panel portions and the transparent film or sheet. The blind louvers or single panel apertured blind louvers and the like may be formed with apertures at an acute angle extending downward towards the airspace formed between a windowpane and the window covering to minimize convective air flow from the room interior into the space between the window and the blind louver when the room temperature exceeds the outside ambient temperature and to prevent heat buildup in the space between the window coverings and the windowpane when the temperature in the room interior air space is less than the temperature in the airspace between the window covering and the windowpane.