High yield silicon carbide pre-ceramic polymers
Patent 4310481 Issued on January 12, 1982. Estimated Expiration Date: 
July 23, 2000. 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 23, 2000. 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 3852567 3925133 Polycrystalline silicon carbide with increased conductivity Patent #: 3993602 InventorAssigneeApplicationNo. 06/171551 filed on 07/23/1980US Classes:264/625, Forming carbide or carbonitride containing product423/345, Of carbon (i.e., silicon carbide)427/350, Vacuum or reduced pressure utilized427/387, Silicon compound containing coating428/429, As silicone, silane or siloxane428/446, Of silicon containing (not as silicon alloy)428/447, As siloxane, silicone or silane428/698, Carbide-, nitride-, or sulfide-containing layer501/88, Silicon carbide528/12, Polymerizing in the pressence of a specified material other than a reactant528/23, Material contains a phosphorus or sulfur atom528/33, Silicon reactant contains two or more silicon atoms528/35, Silicon reactamt contains only carbon atom, only a carbon chain, or chain of carbon and oxygen atoms only between two silicon atoms556/430Plural silicons bonded directly to each otherExaminersPrimary: Marquis, Melvyn I.Attorney, Agent or FirmInternational ClassesC08G 77/48 (20060101)C08G 77/00 (20060101) C04B 35/571 (20060101) C04B 35/565 (20060101) AbstractPre-polymers which are substituted with (CH3)3 SiO-groups are useful for the preparation of fine grained silicon carbide ceramic materials. The pre-polymers exhibit ease of handling and their use to obtain silicon carbide ceramic materials results in high yields. |
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