Projection screen
Patent 4566756 Issued on January 28, 1986. Estimated Expiration Date: 
December 27, 2003. 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.
December 27, 2003. 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 1943995 2338654 3523717 3679451 Rear projection screen for a color television projector Rear projection apparatus Patent #: 4443814 InventorApplicationNo. 06/565564 filed on 12/27/1983US Classes:359/453, Rear projection screen359/457With Fresnel lensExaminersPrimary: Hix, L. T.Assistant: Rutledge, Della Attorney, Agent or FirmInternational ClassG03B 21/62 (20060101)Foreign Application Priority Data1983-03-07 NLAbstractA projection screen comprises a single plate of a transparent material. The diffusion in the horizontal direction is provided by filamentary particles which are oriented substantially in one direction in the plate material. Both surfaces of the plate are then capable of performing different functions, yielding a projection screen with an optimally uniform brightness distribution, minimal color faults and maximum contrast. | |
