| 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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| 10/12/1988 | EP0286318A2 Maufacture of wet laid nonwoven webs |
| 10/11/1988 | US4777032 Paper distributing an active compound on burning, and a pyrotechnic distributor using such paper |
| 10/11/1988 | US4776970 Acyclic ester |
| 10/05/1988 | EP0285227A1 A process for preserving paper sheets or webs and a device for carrying out that process |
| 10/05/1988 | EP0285134A2 Hydridoaminosilane treatment for rendering surfaces water-repellent |
| 09/28/1988 | EP0284567A2 Cationic azo dyes |
| 09/28/1988 | EP0284169A1 Reinforced polymer sheet |
| 09/28/1988 | EP0283951A1 Polysaccharide derivatives containing aldehyde groups, their preparation from the corresponding acetals and use in paper |
| 09/27/1988 | US4774285 Preparation of water-soluble copolymers containing vinylamine units, and their use as wet strength agents and dry strength agents for paper |
| 09/27/1988 | US4774022 Diallylammonium halide, n-vinylacetamide copolymer |
| 09/24/1988 | WO1998041582A1 Water-soluble quinacridones |
| 09/22/1988 | DE3707480A1 Paper towel and method of producing it |
| 09/21/1988 | EP0283195A1 Improvements in fibre reinforced plastics structures |
| 09/21/1988 | EP0282862A2 Nitrogen containing, water soluble compounds |
| 09/21/1988 | EP0282761A1 Process for producing paper and board having a high dry strength |
| 09/21/1988 | EP0282571A1 Processes for the production of antistatic or static dissipative paper, and the paper products thus produced, and apparatus utilized. |
| 09/20/1988 | US4772332 Pigments, polyacrylate, lignosulfonate, naphthalenesulfonate-formaldehyde complex |
| 09/20/1988 | CA1242107A1 Casing material resistant to mold fungus |
| 09/15/1988 | DE3713618C1 Process for the preparation of colour-stable solutions of azo dyes |
| 09/15/1988 | DE3713617C1 Process for the preparation of liquid formulations of basic azo dyes |
| 09/14/1988 | EP0281920A2 Dyestuffs with N-(2-aminomethyle)-piperazine groups and their use |
| 09/13/1988 | US4771097 Alkali metal, amine or ammonium salt of maleic anhydride-diisobutylene copolymer optionally containing a vinyl monomer and bis-esterified with a monoalcohol |
| 09/07/1988 | WO1988006659A1 A process for the production of paper |
| 09/07/1988 | WO1988006656A1 Method for dewatering a wet paper web and introducing functional additives |
| 09/06/1988 | US4769274 Relatively inexpensive thermoformable mat of reduced density and rigid laminate which incorporates the same |
| 09/06/1988 | US4769109 Relatively inexpensive thermoformable mat and rigid laminate formed therefrom |
| 09/06/1988 | CA1241570A1 High-density absorbent structures |
| 08/31/1988 | EP0280650A1 Use of predetermined benztriazole derivatives as light-protecting agents for ink jet recording materials |
| 08/31/1988 | EP0280332A1 A method for stabilizing the brightness of bleached lignin containing cellulose pulp |
| 08/31/1988 | EP0280043A1 Paper-sizing agents |
| 08/31/1988 | EP0279880A1 Security paper for currency and banknotes |
| 08/24/1988 | EP0279313A1 Process for preparing a pigmentary agent suited for use in the paper-making industry, said agent improving the printability of paper or board, the agent and its use |
| 08/23/1988 | US4765867 Papermaking |
| 08/16/1988 | US4764418 Tissue paper with carboxylic acid; softness, multilayer |
| 08/16/1988 | CA1240460A1 Pattern treated tissue paper product |
| 08/11/1988 | WO1988005909A1 Method and apparatus for detecting a material with a fluorescent light-emitting substance to be detected |
| 08/03/1988 | EP0276770A2 Paper-sizing agent based on particulate aqueous dispersions |
| 08/02/1988 | US4761205 Embedding a metalized plastic film during the papermaking process |
| 07/28/1988 | WO1988005423A1 Tabular acicular gypsum and method of filling paper |
| 07/27/1988 | EP0275851A1 Aqueous dispersions, a process for their preparation and their use as sizing agents |
| 07/27/1988 | EP0275382A1 Method for preparing composite felt preforms |
| 07/26/1988 | US4759856 Flocculation processes |
| 07/20/1988 | EP0274666A1 Paper-coating compositions comprising whitening agents |
| 07/14/1988 | WO1988005090A1 Non-woven fibre product |
| 07/14/1988 | WO1988004961A1 Pattern forming saturator and impregnating method |
| 07/12/1988 | US4756557 Security document having a security thread embedded therein and methods for producing and testing the authenticity of the security document |
| 07/06/1988 | EP0273605A2 Ultra-fine particulated polymer latex and composition containing the same |
| 07/06/1988 | EP0273075A1 Water setting paper |
| 07/06/1988 | EP0191764B1 Sanitary paper web having high bulk, bulk softness and surface softness and method of manufacturing said web |
| 06/28/1988 | US4754021 Methine-azo compounds containing cyclic ammonium groups |
| 06/28/1988 | US4753831 Cardboard container with anti-slip property |
| 06/28/1988 | US4753710 Using cationic polymer flocculant or retention aid |
| 06/23/1988 | DE3741583A1 Method for destroying microbes in process water of paper-mills |
| 06/21/1988 | CA1238155A1 Conductive fiber mat |
| 06/08/1988 | EP0270129A2 Antibiotic zeolite |
| 06/08/1988 | CN87107768A Aqueous dispersion of cationic polymer |
| 06/07/1988 | US4749800 Polysaccharide esters containing acetal and aldehyde groups |
| 06/01/1988 | EP0268729A1 Production of high bulk calendered paper containing vesiculated beads |
| 05/31/1988 | US4747910 Storage stable paper size composition containing ethoxylated lanolin |
| 05/24/1988 | US4746567 Paper product for storing fragrances |
| 05/17/1988 | US4745286 Luminous sheet and indicia |
| 05/17/1988 | US4744865 Process for controlling pitch deposition from pulp in papermaking systems |
| 05/10/1988 | US4743319 Overlapping partially coherent sheets; cutting, stacking, applying covers |
| 05/10/1988 | CA1236324A1 Sanitary paper web having high bulk, bulk softness and surface softness and method of manufacturing said web |
| 05/04/1988 | EP0265509A1 An antimicrobially active wet wiper |
| 05/03/1988 | US4742160 Sulfo group-containing basic azo compounds having a central 1,3,5-triazine ring and two terminal 1-hydroxynaphthyl-2 groups and 1:1 and 1:2 metal complexes therof |
| 05/03/1988 | CA1235961A1 Process for making pulverulent ammonium polyphosphates stable to hydrolysis |
| 04/27/1988 | EP0265389A2 Liquid lubricant filter with a paper filter element for internal combustion engines, provided with magnetised particles dispersed in the paper |
| 04/27/1988 | EP0265323A1 Fiduciary security object permitting a visual or optical authentification |
| 04/26/1988 | US4740391 Pattern forming saturator and method |
| 04/26/1988 | US4740269 Laser printing,protective coating |
| 04/26/1988 | US4740015 Security document and method of testing same |
| 04/19/1988 | US4738847 * three ply facial tissue; middle ply contains viricide, citric and/or malic acid |
| 04/13/1988 | EP0263099A1 A method of reading valuable documents; a valuable document; and document reading means |
| 04/12/1988 | US4737240 Trisazo black dyes from 2-(4'-aminophenylazo)-7-amino-1-naphthol-3-sulfonic acid |
| 04/05/1988 | US4736425 Security marking method, materials provided with security marks |
| 04/05/1988 | US4736021 4-Benzothiazolyl phenyl azo dyes |
| 03/30/1988 | EP0262040A1 Process for treating a paper pulp with an enzymatic solution |
| 03/30/1988 | EP0261820A1 Filler compositions and their use in manufacturing fibrous sheet materials |
| 03/29/1988 | US4734445 Shell-core polymer; butadiene, isoprene, styrene core, unsaturated polyoxyalkylene shell |
| 03/24/1988 | WO1988002048A1 Filler compositions and their use in papermaking |
| 03/24/1988 | WO1988001910A1 Processes for the production of antistatic or static dissipative paper, and the paper products thus produced, and apparatus utilized |
| 03/23/1988 | CN87106213A Filler compositions and their use in manfacturing fibrous sheet materials |
| 03/16/1988 | EP0259442A1 Fire retardant composition |
| 03/15/1988 | CA1234043A1 Treated non-woven material |
| 03/02/1988 | EP0257412A1 Paper-sizing agent based on particulate aqueous dispersions |
| 02/24/1988 | EP0256922A1 Process to identify or to authentify an element, such as a fiduciary document |
| 02/18/1988 | DE3719480A1 Process for manufacturing paper, paperboard and cardboard having a high dry strength |
| 02/16/1988 | US4725497 Unfalsifiable safety paper |
| 02/16/1988 | CA1232707A1 Method and compositions relating to the activation of fluorescent whitening agents |
| 02/03/1988 | EP0255318A2 Method of making a water laid fibrous web containing one or more fine powders |
| 02/02/1988 | CA1232303A1 Protection of legal documents by reverse penetration |
| 01/20/1988 | EP0253565A1 Pattern forming saturator and method |
| 01/19/1988 | US4720346 Synthetic polymer, shear stability |
| 01/13/1988 | EP0252689A2 Textile processing acidulants |
| 01/13/1988 | EP0252579A1 Security document and method of testing same |
| 01/07/1988 | EP0251132A1 A method for producing paper |
| 01/05/1988 | US4717502 Triazine dyes, paper coating |
| 12/30/1987 | WO1987007854A1 Temperature adaptable textile fibers and method of preparing same |
| 12/29/1987 | US4716062 Composite materials, their preparation and articles made therefrom |