D21H - Pulp compositions; Preparation thereof not covered by subclasses ,; Impregnating or coating of paper; Treatment of finished paper not covered by class or subclass; Paper not otherwise provided for

More topics under "D21H - Pulp compositions; Preparation thereof not covered by subclasses ,; Impregnating or coating of paper; Treatment of finished paper not covered by class or subclass; Paper not otherwise provided for" (93,685)
D21H 11 - Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only (5,468)
D21H 13 - Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material (4,906)
D21H 15 - Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution (1,361)
D21H 17 - Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution (19,322)
D21H 19 - Coated paper; Coating material (15,333)
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)
D21H 23 - Processes or apparatus for adding material to the pulp or to the paper (8,452)
D21H 25 - After-treatment of paper not provided for in groups (4,291)
D21H 27 - Special paper not otherwise provided for, e.g. made by multi-step processes (13,797)

Patents for D21H - Pulp compositions; Preparation thereof not covered by subclasses ,; Impregnating or coating of paper; Treatment of finished paper not covered by class or subclass; Paper not otherwise provided for (487)
03/2001
03/28/2001	CN1289380A Papermaking process using hydrophilic dispersion polmers of diallyldi methyl ammonium chloride and acrylamide as retention and drainage aids
03/14/2001	EP1082493A1 Papermaking process utilizing hydrophilic dispersion polymers of diallyldimethyl ammonium chloride and acrylamide as retention and drainage aids
01/2001
01/17/2001	CN1280641A Soft tissue paper having a softening composition containing an eletrolyte deposited thereon
01/17/2001	CN1280640A Paper starching
12/2000
12/19/2000	US6162329 Mixture of quaternary ammonium compound and salt
08/2000
08/02/2000	EP1023497A1 Soft tissue paper having a softening composition containing an electrolyte deposited thereon
07/2000
07/20/2000	WO2000042253A1 Papermaking process utilizing hydrophilic dispersion polymers of diallyldimethyl ammonium chloride and acrylamide as retention and drainage aids
06/2000
06/28/2000	CN1257787A Securities and bill, and making method thereof
06/21/2000	CN1053614C Security paper with color mark
06/08/2000	WO2000032873A1 Paper making method using a novel retention system comprising a precipitated silica and a cationic polymer
05/2000
05/31/2000	CN1254777A Technology for making paper of cecurities
05/24/2000	CN1052770C Process for making paper by using silica sols
05/16/2000	CA2113541C Improved process for applying polysiloxane to tissue paper
05/03/2000	EP0904330A4 Lignin-based vapor barrier formulations
04/2000
04/26/2000	CN1051826C Water-contained paper coating composition, its preparation method and use thereof
04/05/2000	EP0700473B1 Process for producing paper
03/2000
03/08/2000	CN1246900A Aqueous dispersions of hydrophobic material
03/08/2000	CN1246899A Sizing of paper
02/2000
02/09/2000	EP0740686B1 Papermaking compositions, process using same, and paper produced therefrom
01/2000
01/18/2000	CA2102271C Security paper with color mark
12/1999
12/15/1999	EP0963485A2 Sizing of paper
12/15/1999	EP0963484A1 Sizing of paper
12/08/1999	EP0961855A1 Aqueous dispersions of hydrophobic material
09/1999
09/15/1999	EP0693915B1 Absorbent core for use in catamenial products
06/1999
06/01/1999	CA2133067C Soft absorbent tissue paper containing a biodegradable quaternized amine-ester softening compound and a temporary wet strength resin
04/1999
04/08/1999	WO1999016974A1 Soft tissue paper having a softening composition containing an electrolyte deposited thereon
04/08/1999	CA2305567A1 Soft tissue paper having a softening composition containing an electrolyte deposited thereon
03/1999
03/31/1999	EP0904330A1 Lignin-based vapor barrier formulations
01/1999
01/12/1999	CA2113416C Absorbent core for use in catamenial products
11/1998
11/12/1998	WO1998033982A3 Sizing of paper
10/1998
10/25/1998	CA2235637A1 Improved papermaking process
10/21/1998	EP0773872B1 A security product, a film and a method of manufacture of a security product
08/1998
08/19/1998	EP0502089B2 Silica sols, a process for the production of silica sols and use of the sols
08/06/1998	WO1998033982A2 Sizing of paper
08/06/1998	WO1998033980A1 Aqueous dispersions of hydrophobic material
08/06/1998	WO1998033979A1 Sizing of paper
03/1998
03/11/1998	EP0740686A4 Papermaking compositions, process using same, and paper produced therefrom
08/1997
08/06/1997	EP0633963B1 Soft absorbent tissue paper containing a biodegradable quaternized amine-ester softening compound and a temporary wet strength resin
07/1997
07/01/1997	US5643414 Silica sols in papermaking
05/1997
05/21/1997	EP0773872A1 A security product, a film and a method of manufacture of a security product
02/1997
02/12/1997	EP0757971A1 Process for obtaining a charge of dihydrate calcium sulfate in the form of acicular crystals and utilization in the paper making industry
11/1996
11/06/1996	EP0740686A1 Papermaking compositions, process using same, and paper produced therefrom
11/05/1996	CA2067495C Silica sols, a process for the production of silica sols and use of the sols
10/1996
10/22/1996	CA2067506C Silica sols, a process for the production of the silica sols and use of the sols
08/1996
08/08/1996	WO1996023729A1 Process for obtaining a charge of dihydrate calcium sulfate in the form of acicular crystals and utilization in the paper making industry
04/1996
04/10/1996	CN1120100A Laminate base stock
03/1996
03/13/1996	EP0700473A1 Process for producing paper
02/1996
02/15/1996	WO1996004143A1 A security product, a film and a method of manufacture of a security product
01/1996
01/31/1996	EP0693915A1 Absorbent core for use in catamenial products
01/31/1996	CN1115817A Silica sols, a process for the production of silica sols and use of the sols
11/1995
11/29/1995	CN1112623A Lanminate base stock
11/22/1995	CN1112359A Security paper with color mark
11/02/1995	EP0679205A1 Paper products containing a biodegradable chemical softening composition
09/1995
09/12/1995	US5449200 Security paper with color mark
09/05/1995	US5447604 Silica sols, a process for the production of silica sols and use of the sols
06/1995
06/01/1995	WO1995014737A1 Papermaking compositions, process using same, and paper produced therefrom
05/1995
05/24/1995	EP0595994B1 Improved process for applying a polysiloxane to tissue paper
04/1995
04/12/1995	EP0504245B1 Paper coating
02/1995
02/22/1995	EP0512038B1 Reducing foaming in paper manufacture
12/1994
12/22/1994	WO1994029105A1 Security paper with color mark
12/14/1994	EP0628408A1 Security paper with color mark
11/1994
11/29/1994	US5368833 Aluminum modified surface, used in papermaking
08/1994
08/02/1994	US5334176 Absorbent core for use in catamenial products
06/1994
06/22/1994	EP0502089B1 Silica sols, a process for the production of silica sols and use of the sols
06/22/1994	EP0491879B1 Silica sols, a process for the production of silica sols and use of the sols
03/1994
03/08/1994	US5292363 Amphoteric softener, cationic softener, acid, surfactant and carbamide; enhances brightness, opacity, sizing
11/1993
11/16/1993	US5262007 Soft absorbent tissue paper containing a biodegradable quaternized amine-ester softening compound and a temporary wet strength resin
10/1993
10/28/1993	WO1993021383A1 Soft absorbent tissue paper containing a biodegradable quaternized amine-ester softening compound and a temporary wet strength resin
07/1993
07/22/1993	WO1993014263A1 Process for producing paper
07/22/1993	CA2127992A1 Process for producing paper
06/1993
06/01/1993	US5215626 Wet-laying cellulose fibers to form webs, drying, creping and applying polysiloxane material and surfactant to hot creped webs; balanced softness against tensile strength
04/1993
04/14/1993	EP0536855A2 Security strip for a security paper for currency & banknotes
03/1993
03/10/1993	CN1069649A Absorbent core for use in catamenial products
03/03/1993	EP0298120B1 Tabular acicular gypsum and method of filling paper
02/1993
02/04/1993	WO1993002252A1 Improved process for applying a polysiloxane to tissue paper
02/04/1993	WO1993002251A1 Absorbent core for use in catamenial products
11/1992
11/11/1992	EP0512038A1 Reducing foaming in paper manufacture.
09/1992
09/29/1992	CA1307903C Tabular acicular gypsum and method of filling paper
09/23/1992	EP0504245A1 Paper coating.
09/09/1992	EP0502089A1 Silica sols, a process for the production of silica sols and use of the sols.
07/1992
07/01/1992	EP0491879A1 Silica sols, a process for the production of silica sols and use of the sols.
06/1992
06/12/1992	CA2054835A1 Hydrogen peroxide bleach stabilization system
04/1992
04/15/1992	EP0304463B1 A process for the production of paper
10/1991
10/08/1991	CA1290108C Process for the production of paper
09/1991
09/24/1991	CA1289305C Production of high strength linerboard with oxygen and alkali
07/1991
07/23/1991	WO1991010776A1 Reducing foaming in paper manufacture
07/23/1991	CA2074066A1 Reducing foaming in paper manufacture
07/10/1991	CN1052912A 纸张涂层 Paper Coatings
06/1991
06/13/1991	WO1991008341A1 Paper coating
06/13/1991	CA2072641A1 Paper coating
05/1991
05/10/1991	WO1991007351A1 Silica sols, a process for the production of silica sols and use of the sols
05/09/1991	WO1991007350A1 Silica sols, a process for the production of silica sols and use of the sols
03/1991
03/12/1991	CA2016262A1 Process for sizing calcium carbonate-containing papers with resin size dispersions
10/1990
10/23/1990	US4964954 Process for the production of paper
08/1990
08/08/1990	EP0381379A1 Process of offset lithographic printing
07/1990
07/28/1990	WO1990008853A1 Emulsion polymerisation
07/28/1990	CA2024810A1 Emulsion polymerisation
11/1989
11/30/1989	DE2950499C2 Paper web used as battery separator - contains synthetic fibrils, inorganic filler and wetting agent
10/1989
10/17/1989	US4873939 Short-dwell coater for coating a web with coating mix
09/1989
09/26/1989	CA1261109A1 High density para-aramid papers

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