Assignee
WOLFF WALSRODE AG
182 granted patents·1 pending application·3,171 citations·filing 1973–2003
Top patents by PatentIndex Score
183 records- 0192US5684081ARadiation-curable, aqueous dispersions, production and use thereofWOLFF WALSRODE AG·Filed 1996·Granted Nov 4, 1997·73 cites·3 claims
- 0292US4842930AHeat-sealable multi-layer films of polyolefinsWOLFF WALSRODE AG·Filed 1987·Granted Jun 27, 1989·62 cites·6 claims
- 0390US5385607AWater-soluble sulphoalkyl hydroxyalkyl derivatives of cellulose and their use in gypsum- and cement-containing compoundsWOLFF WALSRODE AG·Filed 1993·Granted Jan 31, 1995·55 cites·2 claims
- 0489US5484903AProcess for the production of polysaccharide carbonatesWOLFF WALSRODE AG·Filed 1992·Granted Jan 16, 1996·50 cites·3 claims
- 0589US5068321ACarbonic acid esters of polysaccharides and a process for their productionWOLFF WALSRODE AG·Filed 1989·Granted Nov 26, 1991·48 cites·11 claims
- 0688US7259257B2Process for producing particulate, water-soluble cellulose derivatives using a superheated gas mixture containing steamWOLFF WALSRODE AG·Filed 2001·Granted Aug 21, 2007·34 cites·8 claims
- 0788US5062889AProcess for the preparation of hydrocolloid mixtures having improved dispersibilityWOLFF WALSRODE AG·Filed 1990·Granted Nov 5, 1991·67 cites·8 claims
- 0886US6419995B1Process for the surface activation of materialsWOLFF WALSRODE AG·Filed 2001·Granted Jul 16, 2002·21 cites·10 claims
- 0983US6613394B2Method of surface treating or coating of materialsWOLFF WALSRODE AG·Filed 2001·Granted Sep 2, 2003·47 cites·10 claims
- 1082US5994445APolyamide mixtures which contain solid particlesWOLFF WALSRODE AG·Filed 1997·Granted Nov 30, 1999·73 cites·6 claims
- 1182US5356676ACoextruded biaxially stretched tubular filmWOLFF WALSRODE AG·Filed 1992·Granted Oct 18, 1994·60 cites·16 claims
- 1282US5089586AWater-dispersible allyl urethanes and their use for the production of paintsWOLFF WALSRODE AG·Filed 1989·Granted Feb 18, 1992·29 cites·10 claims
- 1381US6541087B1Multilayer, biaxially stretched, high-barrier plastic skinWOLFF WALSRODE AG·Filed 2000·Granted Apr 1, 2003·26 cites·11 claims
- 1480US7022357B2Process for the preparation of smoke-impregnated tubular casingsWOLFF WALSRODE AG·Filed 2002·Granted Apr 4, 2006·21 cites·5 claims
- 1580US6509461B2Process for producing particulate, water-soluble cellulose derivativesWOLFF WALSRODE AG·Filed 2001·Granted Jan 21, 2003·21 cites·15 claims
- 1680US4970247AAqueous cellulose ester dispersions and their preparationWOLFF WALSRODE AG·Filed 1989·Granted Nov 13, 1990·31 cites·10 claims
- 1780US4668575AHeat sealable multilayer films with low permeability to gas and their use as packaging materialWOLFF WALSRODE AG·Filed 1986·Granted May 26, 1987·38 cites·10 claims
- 1879US6891034B2Process for preparing alkylhydroxyalkyl celluloseWOLFF WALSRODE AG·Filed 2001·Granted May 10, 2005·19 cites·7 claims
- 1979US6364363B1Film with a security feature, a process for the production thereof and the use thereof as packaging materialWOLFF WALSRODE AG·Filed 2000·Granted Apr 2, 2002·24 cites·4 claims
- 2079US4666772AOpaque, heat sealable multilayer polyolefin filmsWOLFF WALSRODE AG·Filed 1986·Granted May 19, 1987·42 cites·10 claims
- 2178US6939961B1Method for the production of low-viscous water soluble cellulose ethersWOLFF WALSRODE AG·Filed 1999·Granted Sep 6, 2005·39 cites·9 claims
- 2278US6593468B1Essentially fiber-free cellulose ether with improved water retention, method for the production and use thereofWOLFF WALSRODE AG·Filed 1998·Granted Jul 15, 2003·38 cites·13 claims
- 2378US5077129AStretched polypropylene films having good surface slipWOLFF WALSRODE AG·Filed 1991·Granted Dec 31, 1991·30 cites·10 claims
- 2478US4692386ASealable multilayer polyolefin filmsWOLFF WALSRODE AG·Filed 1986·Granted Sep 8, 1987·34 cites·10 claims
- 2578US4348457ASealable multilayer film of polyolefinsWOLFF WALSRODE AG·Filed 1980·Granted Sep 7, 1982·34 cites·10 claims
- 2677US6524712B1Flexible multilayer filmWOLFF WALSRODE AG·Filed 2001·Granted Feb 25, 2003·21 cites·10 claims
- 2777US5449552AWhite opaque barrier layer film with excellent lay-flat propertiesWOLFF WALSRODE AG·Filed 1994·Granted Sep 12, 1995·61 cites·12 claims
- 2877US4990609ASulfoethyl cellulose of high solution quality and a process for its productionWOLFF WALSRODE AG·Filed 1988·Granted Feb 5, 1991·24 cites·10 claims
- 2977US4398024AProcess for the purification of cellulose and starch ethersWOLFF WALSRODE AG·Filed 1981·Granted Aug 9, 1983·29 cites·4 claims
- 3076US6320043B1Process for preparing fine-particle polysaccharide derivativesWOLFF WALSRODE AG·Filed 1998·Granted Nov 20, 2001·38 cites·29 claims
- 3176US6274246B1Flexible, polyamide-containing multi-layer film having an improved thermo-forming capacity due to moisteningWOLFF WALSRODE AG·Filed 1999·Granted Aug 14, 2001·47 cites·17 claims
- 3276US5126197AHeat-laminatable, high-gloss multilayer filmsWOLFF WALSRODE AG·Filed 1990·Granted Jun 30, 1992·47 cites·8 claims
- 3375US5747124APolyamide sausage casings having improved skinning characteristicsWOLFF WALSRODE AG·Filed 1996·Granted May 5, 1998·28 cites·18 claims
- 3475US5126198AHeat-laminatable, gas-barrier multi-layer filmsWOLFF WALSRODE AG·Filed 1989·Granted Jun 30, 1992·45 cites·8 claims
- 3574US6732493B2Method for packaging foodsWOLFF WALSRODE AG·Filed 2003·Granted May 11, 2004·10 cites·15 claims
- 3674US6274653B1Bonding agent preparations for paints, the production and use thereofWOLFF WALSRODE AG·Filed 1998·Granted Aug 14, 2001·29 cites·7 claims
- 3774US4451649AProcess for the production of hydroxypropyl starchWOLFF WALSRODE AG·Filed 1982·Granted May 29, 1984·31 cites·5 claims
- 3873US6407151B1Aqueous coating agent and its use in lacquersWOLFF WALSRODE AG·Filed 2000·Granted Jun 18, 2002·14 cites·7 claims
- 3973US5425974A5-layered coextruded biaxially stretched tubular film having at least 3 polyamide layersWOLFF WALSRODE AG·Filed 1994·Granted Jun 20, 1995·31 cites·13 claims
- 4073US4330441ASolvent-soluble substances characterized in that water-soluble cellulose ethers are chemically bonded to water-soluble, at least predominately synthetic polymers containing acrylic unitsWOLFF WALSRODE AG·Filed 1979·Granted May 18, 1982·23 cites·13 claims
- 4172US6503617B2Multilayer film laminatesWOLFF WALSRODE AG·Filed 2001·Granted Jan 7, 2003·16 cites·9 claims
- 4272US6489468B1Regioselectively substituted esters of oligo- and polysaccharides and a method of producing themWOLFF WALSRODE AG·Filed 2000·Granted Dec 3, 2002·8 cites·2 claims
- 4372US5258429ACellulose ether compositions for aqueous mediaWOLFF WALSRODE AG·Filed 1992·Granted Nov 2, 1993·25 cites·9 claims
- 4471US5928739ABiaxially stretched, biodegradable and compostable sausage casingWOLFF WALSRODE AG·Filed 1997·Granted Jul 27, 1999·48 cites·9 claims
- 4571US5501905AMatt biaxially stretched polypropylene film and a process for producing the sameWOLFF WALSRODE AG·Filed 1994·Granted Mar 26, 1996·30 cites·7 claims
- 4671US4972007AUse of cellulose derivatives in drilling fluidsWOLFF WALSRODE AG·Filed 1988·Granted Nov 20, 1990·27 cites·10 claims
- 4770US6880772B2Process and apparatus for combined milling and dryingWOLFF WALSRODE AG·Filed 2002·Granted Apr 19, 2005·15 cites·10 claims
- 4870US6517920B1Multilayer, coextruded, biaxially stretched high-barrier plastic casingWOLFF WALSRODE AG·Filed 2000·Granted Feb 11, 2003·18 cites·19 claims
- 4970US5395681AMultilayered polyurethane film and the use thereof as packaging material for photosensitive materialWOLFF WALSRODE AG·Filed 1993·Granted Mar 7, 1995·37 cites·15 claims
- 5070US4400428ASealable multilayer filmsWOLFF WALSRODE AG·Filed 1982·Granted Aug 23, 1983·47 cites·15 claims
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