Filler and wax composition for investment casting
Patent 5006583 Issued on April 9, 1991. Estimated Expiration Date: 
August 15, 2008. 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.
August 15, 2008. 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 3409566 3509078 3554949 3561685 3854962 3880790 Production of powdered resin and the powdered resin so produced Patent #: 4404346 InventorAssigneeApplicationNo. 232476 filed on 08/15/1988US Classes:524/277, Carnauba wax, beeswax, montan wax, or oxidized microcrystalline wax or modified forms thereof106/38.6, Natural resin or derivative containing106/38.8, Wax, bituminous material or tarry residue containing106/230, With wax106/272, With filler, dye or pigment428/402, Particulate matter (e.g., sphere, flake, etc.)524/77, Natural resin or modified forms thereof other than rosin or its modified forms DNRM, e.g., shellac, dammar, etc.524/275, Oxygen wax DNRM524/487, Hydrocarbon wax524/488, Microcrystalline wax524/489, Wax having melting point above 120 deg. F (49 deg. C)524/577, From aromatic hydrocarbon monomer528/502FShearing to change polymer particle size or to change polymer propertiesExaminersPrimary: Teskin, FredAttorney, Agent or FirmForeign Patent References
International ClassesC08L 047/00B28B 007/28 AbstractIrregular shaped particles of cross-linked copolymer of styrene-divinylbenzene in which essentially 90% or more of the particles pass through a 100 mesh screen (U.S. Sieve Series) and essentially 50% pass through a 200 mesh screen (U.S. Sieve Series) is produced by high speed attrition milling of relatively inexpensive large-sized copolymer beads. The resulting particles are irregularly shaped cross-linked copolymer particles which are desirable and useful as a filler material for investment casting waxes. The small-sized irregularly-shaped cross-linked copolymer beads produced by high speed attrition milling essentially eliminate any "orange peel" effect on wax pattern surface and also results in improved packing of the wax composition thereby producing high quality precision parts more readily than heretofore possible.Field of SearchOxygen wax DNRMCarnauba wax, beeswax, montan wax, or oxidized microcrystalline wax or modified forms thereof From aromatic hydrocarbon monomer Hydrocarbon wax Microcrystalline wax Natural resin or modified forms thereof other than rosin or its modified forms DNRM, e.g., shellac, dammar, etc. Wax having melting point above 120 deg. F (49 deg. C) Wax, bituminous material or tarry residue containing With filler, dye or pigment With wax Natural resin or derivative containing Particulate matter (e.g., sphere, flake, etc.) Divinyl benzene | |
