Lens for filtering visible and ultraviolet electromagnetic waves during dental procedures
Patent 5182588 Issued on January 26, 1993. Estimated Expiration Date: 
July 1, 2011. 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.
July 1, 2011. 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 1257667 1865715 2334446 2964427 3588216 3628854 3826564 Optical filtering element including fluorescent material Eye shield for blocking ultraviolet rays Patent #: 4758079 InventorsApplicationNo. 724149 filed on 07/01/1991US Classes:351/165, With sections of different light absorption433/226By filling, bonding or cementingExaminersPrimary: Sugarman, Scott J.Attorney, Agent or FirmInternational ClassesG02C 007/10A61C 005/00 AbstractLenses coated with a UV light absorbing coating and a blue light absorbing coating protect the eyes of a dental practitioner from harmful radiation emitted by a light source used during dental curing procedures. The lenses include a clear portion which allows the wearer to view the treated area without a loss of contrast encountered when the treated area is viewed through the portion of the lenses provided with the blue light absorbing coating.Other References
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