Laminated transparent polarizing glasses and method of making
Patent 4977028 Issued on December 11, 1990. Estimated Expiration Date: 
June 26, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 26, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2481830 2544659 2553961 Optically clear articles incorporating protective plastic coatings Patent #: 4261656 InventorsAssigneeApplicationNo. 371298 filed on 06/26/1989US Classes:428/426, Of quartz or glass359/485, Light polarization without any external input428/423.3, Next to second layer of polyamidoester428/432Next to metal or compound thereofExaminersPrimary: Cashion, Merrell C. Jr.Assistant: Hulina, Amy Attorney, Agent or FirmForeign Patent References
International ClassesB32B 017/06B32B 007/10 B32B 027/40 Foreign Application Priority Data1982-07-27 FRAbstractThis invention is directed to the production of laminated, transparent, polarizing glass articles. The inventive method contemplates five basic steps:(1) forming parallel microgrooves on a surface of a glass support;(2) washing and drying said surface;(3) depositing on said surface a mixture of organic colorants corresponding to the three primary colors and exhibiting a nematic state to yield a coating displaying polarizing properties;(4) treating the polarizing coating with an aqueous solution of inorganic salts having an acid pH; and(5) applying a continuous, optically transparent, composite film upon the polarizing coating and bonding it thereto. | |
