IPC 2013 : D21H 17/27 : Esters thereof.

IPC2013 > D > D21 > D21H > D21H 17/00 > D21H 17/27[5] > Esters thereof.
Notes[n] D21H 17/01 - D21H 17/63:
  • In groups D21H 17/01 - D21H 17/63, in the absence of an indication to the contrary, a material is classified in the last appropriate place.
  • A mixture of two or more materials is classified in the last appropriate place in groups D21H 17/01 - D21H 17/63 that provides for at least one of these materials.
  • Any part of a mixture which is not identified by the classification according to note (2), and which itself is determined to be novel and non-obvious, must also be classified in the last appropriate place in groups D21H 17/01 - D21H 17/63 . The part can be either a single material or a mixture in itself.
  • A part of a mixture which is not identified by the classification according to note (2) or (3), and which is considered to represent information of interest for search, may also be classified in the last appropriate place in groups D21H 17/01 - D21H 17/63 . This can for example be the case when it is considered of interest to enable searching of mixtures using a combination of classification symbols. Such non-obligatory classification should be given as "additional information".
D SECTION D — TEXTILES; PAPER.
D21 PAPER-MAKING; PRODUCTION OF CELLULOSE.
D21H PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR.
D21H 17/00 Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution.
D21H 17/27 · · · · · Esters thereof.

CIP2013: Invenciones publicadas en esta sección.

  1. 1.-

    Un proceso para preparar partículas pigmentarias autoligantes que comprende los siguientes pasos: a) proporcionar una suspensión que comprende al menos un material que contiene carbonato de calcio, b) proporcionar un ligante polimérico aniónico, en donde dicho ligante comprende al menos un polisacárido modificado, c) proporcionar al menos un polímero catiónico, en donde el al menos un polímero catiónicio del paso c) se selecciona del grupo que consiste en poliaminas, polietileniminas, poliacrilamidas, resinas de epiclorhidrina catiónicas, cloruro de...

  2. 2.-

    FIBRAS CELULOSICAS MODIFICADAS CON ALDEHIDOS, PARA PRODUCTOS PAPELEROSQUE TIENEN UNA ALTA RESISTENCIA INICIAL EN ESTADO HUMEDO.

    . Ver ilustración. Solicitante/s: THE PROCTER & GAMBLE COMPANY. Inventor/es:

    LA INVENCION SE REFIERE A LA FORMACION DE FIBRAS CELULOSICAS MODIFICADAS, MEDIANTE ESTERIFICACION DE FIBRAS CELULOSICAS CON UN ALQUENO SUSTITUIDO EN POSICIONES 1, 2, QUE TIENE AL MENOS UN GRUPO DE ACIDO CARBOXILICO REACTIVO FRENTE A LOS GRUPOS HIDROXILO CELULOSICOS Y OXIDACION DE LAS FIBRAS ESTERIFICADAS PARA FORMAR GRUPOS ALDEHIDO. DICHAS FIBRAS MODIFICADAS SON UTILES EN PRODUCTOS DE PAPEL QUE TIENDEN A PRESENTAR UNA RESISTENCIA EN ESTADO HUMEDO TEMPORAL. SE PUEDEN AÑADIR AL PRODUCTO DE PAPEL ADITIVOS DE RESISTENCIA, PARA CONFERIR UN ELEVADO NIVEL DE RESISTENCIA EN ESTADO HUMEDO, TEMPORAL O PERMANENTE.