US Patent Class 423
CHEMISTRY OF INORGANIC COMPOUNDS-- Main Headings




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Current as of: June, 1999
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CLASS NOTES
700  DF  ZEOLITE {7}
1  DF  TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15}
210  DF  MODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURE {11}
249  DF  RADIOACTIVE (AT. NO. 84+ OR RADIOACTIVE ISOTOPE OF ANOTHER ELEMENT) {3}
262  DF  INERT OR NOBLE GAS OR COMPOUND THEREOF
263  DF  RARE EARTH COMPOUND (AT. NO. 21, 39, OR 57-71)
264  DF  CHANGING COLOR CHARACTERISTIC OF IMPURITY
265  DF  WITH ADDITIVE {7}
276  DF  BORON OR COMPOUND THEREOF {5}
299  DF  PHOSPHORUS OR COMPOUND THEREOF {5}
324  DF  SILICON OR COMPOUND THEREOF {4}
351  DF  NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID) {5}
414  DF  CARBON OR COMPOUND THEREOF {3}
462  DF  HALOGEN OR COMPOUND THEREOF {10}
508  DF  SELENIUM OR TELLURIUM OR COMPOUND THEREOF {2}
511  DF  SULFUR OR COMPOUND THEREOF {4}
579  DF  OXYGEN OR COMPOUND THEREOF {4}
644  DF  HYDROGEN OR COMPOUND THEREOF {3}
658.5  DF  EXTRACTING, LEACHING, OR DISSOLVING
659  DF  MISCELLANEOUS PROCESS
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DIGESTS
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DIG 1  DF  Waste acid containing iron {1}
DIG 3  DF  Papermaking liquor
DIG 4  DF  Manganese marine modules
DIG 5  DF  Automatic (including computer) control
DIG 6  DF  Temperature control
DIG 7  DF  Isotope separation
DIG 8  DF  Corrosion or deposition inhibiting
DIG 9  DF  Reaction techniques {8}
DIG 18  DF  Treating trash or garbage
DIG 19  DF  Geothermal steam purification
DIG 21  DF  Faujasite; e.g., X, Y, CZS-3, ECR-4, Z-14HS, VHP-r
DIG 22  DF  MFI; e.g., ZSM-5. Silicalite, LZ-241
DIG 23  DF  Ferrierite; e.g., Sr-D ZSM-33
DIG 24  DF  LTA; e.g., A, Alpha, ZK-4, ZK-21, ZK-22
DIG 25  DF  Mordenite; e.g., Na-D, Pttilolite, Zeolon
DIG 26  DF  Mazzite; e.g., ZSM-4, Omega
DIG 27  DF  Beta; e.g., NU-2
DIG 28  DF  LTL; e.g., Ba-g, L, AG-1, AG-2, AG-4, Ba-6
DIG 29  DF  MEL; e.g., ZSM-11
DIG 30  DF  ALPO and SAPO
DIG 31  DF  RHO; e.g., ECR-10, LZ-214
DIG 32  DF  Sodalite; e.g., HS, Ultramarine
DIG 33  DF  MTW; e.g., ZSM-12, NU-13, Czh-5, TPZ-3
DIG 34  DF  Pentasils other than MFI and MEL; e.g., AZ-1, TZ-01, TZ-02, TRS, ZBM-10
DIG 35  DF  TON; e.g., Theta-1, ISI-1, KZ-2, ZSM-22, NU-10
DIG 36  DF  MTT; e.g., ZSM-23, ISI-1, KZ-1, EU-1, EU-4, EU-13
DIG 37  DF  LEV; e.g., Levynik, ZMT-45, ZK-20, NU-3, LZ-132, LZ-133
DIG 38  DF  Offretite; e.g., TMA Offreite
DIG 39  DF  Fullerene (e.g., C60, C70, etc.) derivative and related process
DIG 40  DF  Fullerene composition