Patents
Sitemap › D21 - Paper-making; Production of cellulose › 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)
03/1989
03/01/1989EP0304463A1 A process for the production of paper.
01/1989
01/31/1989US4801355 Tabular acicular gypsum and method of filling paper
12/1988
12/13/1988CA1246607A1 2,2-bis(2-perfluoroalkyl ethylthio)acetaldehydes and process for preparing the same
11/1988
11/15/1988CA1244617A1 Method for preparing paperlike products from fibers treated with polymer
09/1988
09/07/1988WO1988006659A1 A process for the production of paper
08/1988
08/31/1988EP0279880A1 Security paper for currency and banknotes
08/09/1988US4761858 Procedure and apparatus for controlling the surface mass distribution of paper web
08/09/1988CA1240217A1 Paper coating apparatus and method
08/02/1988US4761205 Embedding a metalized plastic film during the papermaking process
07/1988
07/28/1988WO1988005423A1 Tabular acicular gypsum and method of filling paper
07/06/1988EP0015970B2 Battery separator material
07/05/1988US4755259 Process for papermaking
03/1988
03/08/1988US4729921 High density para-aramid papers
03/01/1988US4728539 Trailing and flexible blades
01/1988
01/26/1988US4721812 2,2-bis-(2-perfluoroalkylethylthio)-acetaldehydes and process for production thereof
09/1987
09/16/1987EP0223773A4 Ferrous metal corrosion inhibiting sheet material.
09/09/1987EP0235214A1 A distributor unit for dry laying out of fibres, preferably for dry manufacturing of paper
07/1987
07/28/1987US4683339 2,2-bis-(2-perfluoroalkylethylthio)-acetaldehydes and process for production thereof
06/1987
06/03/1987EP0223773A1 Ferrous metal corrosion inhibiting sheet material
03/1987
03/24/1987US4652015 Security paper for currency and banknotes
03/12/1987WO1987001403A1 A distributor unit for dry laying out of fibres, preferably for dry manufacturing of paper
02/1987
02/19/1987DE3624470A1 Method and device for improving a web-drying process
12/1986
12/04/1986WO1986007009A1 Ferrous metal corrosion inhibiting sheet material
11/1986
11/19/1986CN86102786A Foam applicator used inpaper treatment
10/1986
10/22/1986EP0198622A1 Paper coating apparatus and method
10/08/1986EP0196576A1 Foam applicator used in paper treatment
10/07/1986US4615689 Method for preparing paperlike products from fibers threaded with polymer
09/1986
09/10/1986CN85108677A Process for the preparation of acetaldehyde derivatives
07/1986
07/09/1986EP0187031A1 Method for preparing paperlike products from fibers treated with polymer
06/1986
06/04/1986EP0183612A1 Bis(perfluoroalkyl-2-ethylthio)-2,2-acetaldehydes and process for their preparation
04/1986
04/23/1986EP0178943A1 High density para-aramid papers
04/08/1986US4581254 Foam applicator used in paper treatment
12/1985
12/10/1985US4557966 Ferrous metal corrosion inhibiting sheet material
11/1985
11/06/1985EP0159985A1 Improvements in or relating to electro-sensitive materials
09/1985
09/24/1985CA1193808A1 Chemical pulp having improved strength, drainability and beatability, and a process of making said pulp
05/1985
05/14/1985CA1186857A1 Process for papermaking
04/1985
04/09/1985US4510185 Process for the surface modification of synthetic fibers
03/1985
03/12/1985CA1183658A1 Process for the surface modification of synthetic fibres
06/1984
06/21/1984WO1984002308A1 Improvements in or relating to electro-sensitive materials
11/1983
11/15/1983CA1156813A1 System for full width feeding of lightly compacted uniform batts of non-bonded fibers to a flow control and separating mechanism in a system for forming an air-laid web of dry fibers
11/10/1983WO1983003858A1 Dry paper machine
09/1983
09/07/1983EP0087453A1 Multilayered fibrous product
08/1983
08/03/1983EP0084654A2 Process for the superficial modification of synthetic fibres
06/1983
06/28/1983CA1148706A1 Preparation of hydrophilic polyolefin fibers for use in papermaking
06/14/1983CA1147911A1 Method for producing combustion resistant fibrous products
06/09/1983WO1983001970A1 A process for paper making and paper product
06/08/1983EP0080986A2 A process for papermaking
06/01/1983EP0015970B1 Battery separator material
03/1983
03/17/1983WO1983000888A1 Multilayered fibrous product
02/1983
02/08/1983CA1140707A1 Paper
11/1982
11/09/1982CA1135099A1 Manufacture of absorbent paper products
10/1982
10/05/1982US4352719 Method for producing combustion resistant fibrous products
08/1982
08/19/1982WO1982002730A1 Inorganic filling agent composition of high retention for paper industry
04/1982
04/13/1982US4324820 Deflection with bar of coating liquid to form free-standing curtain which impinges on substrate
04/13/1982CA1121565A1 Process and apparatus for the manufacture of fibrous webs
01/1982
01/27/1982EP0044661A1 Method and apparatus for coating a web
01/12/1982CA1115908A1 Process for manufacture of thermoformable panels
01/06/1982EP0043290A1 Process and apparatus for producing non-woven fibrous cellulosic sheet material
12/1981
12/01/1981CA1113208A1 Preparation of hydrophilic polyolefin fibers for use in papermaking
08/1981
08/12/1981EP0033391A1 Process for preparing flame retardant or non-combustible products based on fibrous materials
07/1981
07/29/1981EP0032772A1 Apparatus for dry forming of paper or other sheet material of particles or fibres
07/23/1981WO1981002031A1 A system for dry forming of paper or other sheet material of particles or fibres
06/1981
06/23/1981US4274915 Process for manufacturing heat-sealed proofed paper or card on a Fourdrinier machine
01/1981
01/13/1981US4244990 Preimpregnation with urea resin
12/1980
12/09/1980CA1091073A1 Paper composition
11/1980
11/25/1980CA1090060A1 Vapor modified cellulosic fibers
10/1980
10/21/1980CA1087931A1 Method of surface treating paper webs
10/01/1980EP0015970A1 Battery separator material.
08/1980
08/20/1980EP0014534A1 Preparation of hydrophilic polyolefin fibres and paper containing these fibres
08/06/1980EP0014026A1 Paper containing partially cured amino/aldehyde fibres and process for making it
03/1980
03/18/1980CA1073624A1 Method and an apparatus for distributing a disintegrated material onto a layer forming surface
02/1980
02/26/1980CA1072263A1 Process for the reticulation of cellulosic fibers suspended in the air
12/1979
12/13/1979WO1979001057A1 Battery separator material
10/1979
10/09/1979CA1063891A1 Method of impregnating and drying materials and installations for carrying out this method
09/1979
09/18/1979CA1062424A1 Sheets and films of polyolefinic material, similar to paper, and process for producing them
08/1979
08/28/1979CA1061237A1 Treatment of fibrous material
07/1979
07/03/1979CA1057599A1 Flexible decorative cladding sheet or strip
05/1979
05/15/1979US4154647 Treatment with aqueous mixture of cationic and anionic water-soluble nitrogen-containing polymers
05/01/1979US4152317 Process for improving the water wettability of polyolefins
02/1979
02/07/1979EP0000628A1 Process of preparing hydrophilic polyolefin fibers, the fibers so produced, and paper containing said fibers.
12/1978
12/05/1978US4128669 Method of surface treating paper webs
09/1978
09/12/1978US4113936 Cross-linking of cellulose fibers in gas suspension
02/1978
02/21/1978US4074393 Method and apparatus for dry forming a layer of fibers
10/1977
10/18/1977US4054692 Method of impregnating and drying materials and installations for carrying out this method
08/1977
08/09/1977US4040899 Production of high strength packaging papers from straw
03/1976
03/30/1976US3947315 Cellulose
02/1976
02/24/1976US3940538 Decorative melamine laminates with high yield core stock
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