US Patent Class 528
SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
*  DF  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
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CROSS-REFERENCE ART COLLECTIONS
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901  DF  ROOM TEMPERATURE CURABLE SILICON-CONTAINING POLYMER
902  DF  PARTICULATE MATERIAL PREPARED FROM AN ISOCYANATE
903  DF  POLYMERIZING OR PROCESSING AN ISOCYANATE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS
904  DF  ISOCYANATE POLYMER HAVING STATED HYDROPHILIC OR HYDROPHOBIC PROPERTY
905  DF  POLYMER PREPARED FROM ISOCYANATE REACTANT HAS ADHESIVE PROPERTY
906  DF  FIBER OR ELASTOMER PREPARED FROM AN ISOCYANATE REACTANT
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*SUBCLASS 950 WILL BE THE....*
*GENERIC LOCATION FOR THE....*
*520 SERIES THAT PERTAINS TO.*
*MORE THAN ONE OF THE........*
*INDIVIDUAL SERIES OTHER.....*
*THAN THOSE CONCERNED WITH...*
*COMPOSITIONS, E.G., 523,....*
*524, ETC. ..................*
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950  DF  POLYMERS USEFUL FOR REPLACING HARD ANIMAL TISSUES, E.G., DENTURES, BONES, ETC.
930  DF  GUAYULE RUBBER
931  DF  PHYSICAL TREATMENT OF NATURAL RUBBER OR NATURAL RUBBER CONTAINING MATERIAL OR CHEMICAL TREATMENT OF NON-RUBBER PORTION THEREOF, E.G., EXTRACTION OF RUBBER FROM MILK WEED, ETC. {3}