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:
May. 31, 1983
Filed:
Apr. 17, 1981
Takeo Tamura, Yokohama, JP;
Taiji Yamabe, Yokohama, JP;
Nissan Motor Company, Limited, Yokohoma, JP;
Abstract
A mirror which utilizes a transparent synthetic resin such as a polymethyl methacrylate resin in place of glass and is suitable, e.g., as an automobile inside rearview mirror. The back side of the resin plate is coated with a reflective metal film by vacuum deposition, and at least the front side of the resin plate is coated with a surface-hardening film, which is inevitably somewhat permeable to humidity. To prevent warping of the resin plate resulting from its moisture absorption and swelling only in its front region, the reflective film and a back-coat layer covering this film are both made permeable to humidity substantially equally to the surface-hardening film. Preferred material for the reflective film is a Sn--Cu--Cr ternary alloy having high reflectivity and excellent resistance to moisture.