Test plate reader
Patent 4003151 Issued on January 18, 1977. Estimated Expiration Date: 
January 18, 1994. 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.
January 18, 1994. 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 2157437 2332668 3425148 InventorsApplicationNo. 619183 filed on 10/03/1975US Classes:40/575, Interchangeable plate40/367With internal light sourceExaminersPrimary: Mancene, Louis G.Assistant: Wolff, John H. Attorney, Agent or FirmAbstractA test plate reader wherein a transparent test plate having a multiplicity of material containing wells is located across a light path, and a target having a pattern of opaque areas corresponding in number and location to the wells is interposed in the light path between the light source and the plate, so that the wells may be viewed against a brighter uniformly lighted background for improved contrast. | |
