| Patents for D21H 21 - Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper impregnating or coating material, characterised by its function, form or properties (20,755) |
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| 07/10/1990 | US4940514 Making paper, board and cardboard of high dry strength |
| 07/04/1990 | EP0375924A2 Process for producing coated papers and coated cardboards endowed with barrier properties against the migration of water vapour, and so obtained products |
| 07/03/1990 | US4938958 Antibiotic zeolite |
| 07/03/1990 | US4938412 Manufacture of colored egg packages |
| 06/28/1990 | WO1990005211A3 Paper-like or cardboard-like raw material and process for making it |
| 06/27/1990 | EP0374930A2 Waterproof recording material having ground patterns and its manufacturing method |
| 06/27/1990 | EP0374763A2 Security elements in the form of threads or strips to be embedded in security documents, and method of producing and testing same |
| 06/27/1990 | EP0374700A2 Process for preparing mechanical pulp and for paper containing said pulp |
| 06/27/1990 | EP0374478A2 Emulsified functionalized polymers |
| 06/27/1990 | EP0374196A1 Method of reducing pitch in pulping and papermaking |
| 06/27/1990 | CA2006569A1 Alkali metal kurrol's salt as a paper pulp draining aid |
| 06/21/1990 | CA2006007A1 Waterproof recording material having ground patterns and its manufacturing method |
| 06/20/1990 | EP0373432A2 Malachite green-mixing salts |
| 06/20/1990 | EP0373306A2 Colloidal composition and its use in the production of paper and paperboard |
| 06/19/1990 | US4935499 Cationic azo dyes with a 1-hydroxynaphthalene 3-sulfonic acid coupling component, useful for coloring paper |
| 06/19/1990 | US4935307 Comprising a blend of water absorbing hydrophilic polymer, hydrophobic polymer and polyoxyethylene glycol; transparencies for overhead projectors |
| 06/19/1990 | US4935059 Basic rhodamine dyes |
| 06/13/1990 | EP0373137A2 Use of a composition of impregnated mica paper as a covering for building elements, and building elements obtained |
| 06/13/1990 | EP0372715A1 Polymeric basic aluminum silicate-sulphate |
| 06/06/1990 | EP0371957A2 Flame-retardant high-temperature resistant paperlike materials based on thermostable polymers |
| 06/05/1990 | US4931510 Polymers from ethylenic monomers |
| 06/05/1990 | US4931360 Deodorizing sheet with a deodorizing coating formulation |
| 06/05/1990 | US4931319 Method for applying a water repellant composition with a water carrier |
| 05/29/1990 | US4929498 Engineered-pulp wet wiper fabric |
| 05/29/1990 | US4929309 Nitrogen-containing water-soluble polymeric compounds |
| 05/29/1990 | CA2003221A1 Flame-retardant high-temperature resistant paperlike materials based on polyimide fibers |
| 05/23/1990 | CN1042340A Polymeric basic aluminium silicate-sulphate |
| 05/22/1990 | US4927498 Retention and drainage aid for papermaking |
| 05/22/1990 | US4927465 Kaolin clays for pitch control |
| 05/22/1990 | CA1269223A1 Spherically shaped precipitated calcium carbonate, its preparation and use |
| 05/17/1990 | WO1990005211A2 Paper-like or cardboard-like raw material and process for making it |
| 05/15/1990 | US4926190 Ink jet recording process using certain benzotriazole derivatives as light stabilizers |
| 05/15/1990 | US4925528 Polymeric surfactant; thickener; antifoam agent; papermaking |
| 05/15/1990 | CA1269091A1 Non-woven activated carbon fabric |
| 05/09/1990 | EP0367520A2 Improvements in apparatus for forming watermarks in paper |
| 05/09/1990 | EP0366825A1 Process for the preparation of fine platelike boehmite |
| 05/09/1990 | EP0366764A1 Processes for the production of paper and paper board. |
| 05/08/1990 | US4923972 Preparation of liquid formulations of basic azo dyes in carboxylic acid solution and subsequent heating |
| 05/08/1990 | US4923566 Method of pacifying stickies in paper |
| 05/08/1990 | US4923565 Method for treating a paper pulp with an enzyme solution |
| 05/07/1990 | CA2001784A1 Paper, cardboard or paperboard-like material and a process for its production |
| 05/04/1990 | CA2002254A1 Process for the production of fine tabular alumina monohydrate |
| 05/03/1990 | CA2002118A1 Apparatus for forming watermarks in paper |
| 05/02/1990 | EP0365726A1 Improvements in cellulosic fibrous webs |
| 05/01/1990 | US4921945 Disazo dyes containing an acetoacetabukube coupling component and a quaternized aminoalkylene aminocarbonyl group bound to it |
| 05/01/1990 | US4921534 Security markings, material provided with security marks, and apparatus to detect the security mark |
| 05/01/1990 | US4921280 Security fibers and other materials made luminescent by a dyeing process, processes for their manufacture and their applications |
| 04/25/1990 | EP0365307A2 Transparent coatings for graphic applications |
| 04/25/1990 | EP0364772A2 Copolymers containing perfluor alkyl groups |
| 04/25/1990 | EP0364629A1 Paper product prepared with structured latex particles having reinforcing and opacity characteristics and process for preparing the same |
| 04/24/1990 | US4920208 Basic azo dyestuffs |
| 04/24/1990 | US4920171 With protective coating of clay and colloidal polyethylene on one surface only |
| 04/24/1990 | US4919757 Ethylene-aminoalkylacrylamide copolymers quaternized with epichlorhydrin added to pulp slurry; papermaking, electrography |
| 04/24/1990 | US4919725 Novel dispersible active sizing composition |
| 04/19/1990 | DE3835076A1 Antimicrobial emulsions |
| 04/18/1990 | EP0364403A1 Distyryl biphenyl compounds |
| 04/18/1990 | EP0363471A1 Dyed mineral pigments and applications |
| 04/18/1990 | CN1041414A Paper towel for washing bowl |
| 04/17/1990 | US4917765 Vesiculated polymer granules |
| 04/12/1990 | DE3932566A1 New basic pyridone dis to tetrakis and dyestuff cpds. - used for dyeing e.g. leather, cellulose fibre and paper |
| 04/11/1990 | EP0363024A1 Process for the production of high molecular weight copolymers of diallyl dimethyl ammonium chloride and acrylamide in an aqueous dispersed phase |
| 04/11/1990 | EP0362823A2 Paper for photographic purposes |
| 04/11/1990 | EP0362770A2 Dry strength additive for paper |
| 04/05/1990 | WO1990003262A1 Base composition for the fabrication of a flexible and porous sheet product consisting basically of elastomer powder, sheet product and preparation method |
| 04/04/1990 | EP0361431A2 Monoazo pigment, process for its preparation and its use |
| 04/03/1990 | US4913775 Production of paper and paper board |
| 03/22/1990 | WO1990002837A1 Process for controlling pitch deposits in the pulp and papermaking process |
| 03/21/1990 | EP0359590A2 Controlling deposits on paper machine felts and the like |
| 03/21/1990 | EP0359552A2 Polysilicate microgels as retention/drainage aids in papermaking |
| 03/21/1990 | EP0359509A1 Process for the production of high molecular weight copolymers of diallyl dimethyl ammonium chloride and acrylamide in solution |
| 03/21/1990 | EP0359502A2 Flexible absorbent board |
| 03/21/1990 | EP0358996A2 Controlling pitch deposits in the pulp and papermaking processes |
| 03/20/1990 | US4910066 Applying anionic acrylic copolymer and water; drying |
| 03/20/1990 | US4909902 Alkali metal Kurrol's salt as a paper pulp draining aid |
| 03/14/1990 | EP0135566B1 Aluminum zirconium metallo-organic complex useful as coupling and hydrophobic agents |
| 03/13/1990 | US4908100 Adding blend of acrylamide with acrylic or methacrylic acid |
| 03/06/1990 | US4906521 Non-woven fibre product |
| 02/28/1990 | EP0355816A2 Colloidal alumina as a paper retention aid |
| 02/27/1990 | US4904507 Information device |
| 02/22/1990 | WO1990001581A1 A method for the manufacture of light-stable paper from mechanical pulp, and paper produced in accordance with the method |
| 02/14/1990 | EP0354889A2 A method of controlling microbiological deposits on paper making equipment and paper obtained thereby |
| 02/14/1990 | EP0354872A2 Trisazo dyes and process for dyeing paper |
| 02/14/1990 | CN1039607A Sizing composition, method for preparation thereof and method of use |
| 02/13/1990 | CA1265740A1 Antimicrobially active non-woven web used in a wet wiper |
| 01/31/1990 | EP0353212A1 A sizing composition, a method for the preparation thereof and a method of use |
| 01/31/1990 | EP0352930A1 Pressure-sensitive copying paper |
| 01/30/1990 | US4897300 Security paper |
| 01/24/1990 | EP0352229A2 Process for dyeing paper |
| 01/24/1990 | EP0352222A2 Fibre-reactive formazane dyes, process for their preparation and their use |
| 01/23/1990 | US4895759 Saturating grade paper |
| 01/23/1990 | US4895622 Press felt conditioner for neutral and alkaline papermaking systems |
| 01/16/1990 | US4894447 Textiles, polyamides, paper |
| 01/10/1990 | EP0350277A2 Temporary wet strength resins and paper products containing same |
| 01/10/1990 | EP0350276A2 Temporary wet strength resins with nitrogen heterocyclic nonnucleophilic functionalities and paper products containing same |
| 01/10/1990 | EP0349935A2 Aqueous solutions of polyamidoamine-epichlorhydrine resines, process for preparing the same and use |
| 01/10/1990 | CN1038678A Process for production of paper |
| 01/09/1990 | US4892590 Precipitated calcium carbonate-cationic starch binder as retention aid system for papermaking |
| 01/09/1990 | US4892336 Antifalsification document having a security thread embedded therein and a method for producing the same |
| 01/03/1990 | EP0349311A2 Pitch control |
| 01/02/1990 | US4891505 Security markings, material provided with security marks, and apparatus to detect the security mark |