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Class Information
Number: 252/380
Name: Compositions > Preservative agents
Description: Compositions specialized and designed for, or peculiar to, use as or in agents or materials for preventing, inhibiting or reducing chemical or physical changes in other substances or bodies when incorporated or associated therewith, and processes of making the same, excepting compositions and processes of making them which are primarily for use as analytical, testing, or indicating compositions.










Sub-classes under this class:

Class Number Class Name Patents
252/381 Anti-caking, separative or protective coatings or zones 35
252/387 Anti-corrosion 356
252/397 Anti-oxidants or chemical change inhibitants 173


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8603443 High photostability sunscreen composition Dec. 10, 2013
8486915 Compositions of water-insoluble active organic compounds Jul. 16, 2013
8414931 Micronized copper-containing compositions useful to mitigate residues on wood surfaces Apr. 9, 2013
8367079 Liquid preservative compositions Feb. 5, 2013
8361409 Systems and methods for producing aqueous solutions and gases having disinfecting properties and substantially eliminating impurities Jan. 29, 2013
8333908 Fluorine insolubilizers and methods of producing same Dec. 18, 2012
8329063 Low-emission formaldehyde donor preparations Dec. 11, 2012
8293282 Micronized copper-containing compositions useful to mitigate residues on wood surfaces Oct. 23, 2012
8246942 Microbicidal compositions Aug. 21, 2012
8246906 Antimicrobial composition Aug. 21, 2012
8105503 Method of storing thermoresponsive polymer in state of aqueous solution Jan. 31, 2012
8066911 Method of improving flowability of adipic acid Nov. 29, 2011
7976728 Aqueous solution of polymer having upper critical solution temperature, aqueous dispersion of particle modified with the polymer and method of storing the same Jul. 12, 2011
7968050 Method for sterilization of hydrogel contact lenses Jun. 28, 2011
7850771 Emulsion compositions for wood protection Dec. 14, 2010
7740906 Wood preservatives Jun. 22, 2010
7632480 Thermal expansion inhibitor, zero thermal expansion material, negative thermal expansion material, method for inhibiting thermal expansion, and method for producing thermal expansion inhibitor Dec. 15, 2009
7381250 Interior protectant/cleaner composition Jun. 3, 2008
7199181 Stabilising composition II Apr. 3, 2007
7196135 Stabilizing composition I Mar. 27, 2007
7175819 Regeneration of cupric etchants and recovery of copper sulfate Feb. 13, 2007
7153541 Method for inhibiting oxidation of metal sulfide-containing material Dec. 26, 2006
7087753 Naphthyltriazines as stabilizers for organic material Aug. 8, 2006
6964745 Use of superabsorbent polymers for treating raw skins, corresponding compositions and methods and resulting treated skins Nov. 15, 2005
6953534 Engine antifreeze composition Oct. 11, 2005
6946297 System for stabilizing samples Sep. 20, 2005
6855269 Phenyl ether-substituted hydroxyphenyl triazine ultraviolet light absorbers Feb. 15, 2005
6800757 Red-shifted triazine ultravioletlight absorbers Oct. 5, 2004
6762227 Inhibition of marine biofouling of surfaces Jul. 13, 2004
6753301 Thermally stable perfluoropolyethers and processes therefor and therewith Jun. 22, 2004
6743336 Composition for de-acidification of cellulose material Jun. 1, 2004
6736996 Compositions for protecting civil infrastructure May. 18, 2004
6733687 Hybrid supplemental coolant additive May. 11, 2004
6716392 Preservation of liquid biological samples Apr. 6, 2004
6716632 System for stabilizing samples Apr. 6, 2004
6572788 Amine oxide wood preservatives Jun. 3, 2003
6551552 Systems and methods for preventing and/or reducing corrosion in various articles Apr. 22, 2003
6548532 Indolecarboxylic compounds for treating seborrhea and complications thereof Apr. 15, 2003
6541507 Indolecarboxylic compounds for inducing/stimulating hair growth and/or retarding hair loss Apr. 1, 2003
6541019 Preservatives of formulations for topical use Apr. 1, 2003
6531075 Stabilization of perfluoroalkyl alkyl ketones Mar. 11, 2003
6531317 Cytological and histological fixature composition and methods of use Mar. 11, 2003
6485790 Methods for enhancing penetration of wood preservatives Nov. 26, 2002
6447793 Water soluble, broad spectrum preservative system Sep. 10, 2002
6365066 Antifouling paint Apr. 2, 2002
6312774 Wood preservation utilizing polymeric phenol sulfide Nov. 6, 2001
6261844 Urine preservative Jul. 17, 2001
6248159 Wood preservative Jun. 19, 2001
6214253 Omega-hydrofluoroalkyl ethers, precursor carboxylic acids and derivatives thereof, and their preparation and application Apr. 10, 2001
6090855 Quaternary ammonium carbonate compositions and preparation thereof Jul. 18, 2000

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