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:
Jun. 17, 1980
Filed:
Jun. 30, 1977
Philippe E Gravisse, 92 Puteaux, FR;
Other;
Abstract
The present invention has for its object to eliminate the expense of the installation and maintenance of a continuous lighting system for roadways, staircases, doorways and the like by using the light remanence obtained from a photo-luminescent material covering the obstacles or structures to be lighted. The invention provides a material having permanent physical, mechanical and chemical properties which cannot be changed by rubbing or wear; in the textile field, the material may constitute the fabric fibres or a standard fabric can be coated with the material. The material products are photo-luminsecent in their mass and are of the type comprising a synthetic binding agent having a spectral response from the U.V. to close to the I.R., crystalline fillers or charges with a high coefficient of light transmission over the same spectral field and one or more phosphorescent substances, at least one substance absorbing energy from low wavelengths of light and re-emitting this energy at the level of the absorption spectrum of one of the phosphorescent substances, and at least one fluorescent substance selected so as to give a remanent color which can be different from that of the phosphorescent substance.