Optical protuberant bubble recording medium
Patent 4647947 Issued on March 3, 1987. Estimated Expiration Date: 
September 13, 2005. 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.
September 13, 2005. 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 3866187 Recording medium Recording structure for direct read after write recording Heat-mode recording material Optical recording medium Patent #: 4433340 InventorsAssigneeApplicationNo. 06/775958 filed on 09/13/1985US Classes:346/135.1, Laminated, impregnated, or coated bases204/192.26, Optical or photoactive347/264, With record receiver or handling means therefor365/113, Amorphous365/126, Thermoplastic369/284, Radiation beam modified or controlling (e.g., photosensitve, optical track)430/270.12, Having read-write layer of 100 per cent inorganic composition430/290, Light scattering or refractive index image formation430/945, LASER BEAM430/964THERMAL IMAGING COMPOSITIONExaminersPrimary: Goldberg, E. A.Assistant: Preston, Gerald E. Attorney, Agent or FirmInternational ClassesG11B 7/24 (20060101)G11B 7/243 (20060101) Foreign Application Priority Data1982-03-15 JPAbstractA disk-shaped optical type recording medium is disclosed which includes a transparent substrate and recording layer formed on the substrate. The recording layer in a single layer, which is made of a material capable of absorbing energy reaching it through the substrate and being locally raised on one surface according to the absorbed heat energy of the laser beam.Other References
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