For decades books and other paper documents have been deteriorating in archives and libraries around the world because the acidity of the paper is increasing so much (wherein the pH decreases) that the paper cellulose is decomposing so that the paper loses its cohesion and thereby degenerates in terms of quality. The invention relates to an improved …

Legal parties

Inventors (applicants): Stephanus Gerardus Johannes Blankenborg, Maaike Jacobine Esther Van Roosmalen
Assignees (initial): OmniAccess B.V. (Uden, NL)
Agents: Renner, Otto, Boisselle & Sklar, LLP (attorney)

The application was examined by Mark Halpern (USPTO dept. 1741)


  • 1. Method for de-acidifying paper, comprising the steps of: …
  • 2. Method as claimed in claim 1 , wherein step A) is performed at a temperature …
  • 3. Method as claimed in claim 1 , wherein the aminoalkylalkoxysilane compound is formed by at least …

International priority data

NL: 2000862 / Sep. 17, 2007 (national)

Cited documents


  • WO 97/39190, Oct. 1, 1997
  • FR 2 825 726, Dec. 1, 2002


Brief Description of Drawings

The invention will be elucidated with reference to non-limitative exemplary embodiments shown in the following figures. Herein: FIG. 1 shows a reaction equation of the hydrolysis and subsequent condensation of an aminoalkylalkoxysilane …


Brief Summary

This application is a national phase of International Application No. PCT/NL2008/050609 filed Sep. 17, 2008 and published in the English language. The invention relates to a method for de-acidifying paper. …

Detailed Description

FIG. 1 shows a reaction equation of the hydrolysis and subsequent condensation of an aminoalkylalkoxysilane compound as applied in the method according to the invention. FIG. 1 more particularly shows …

More details about Method and Device for a De-Acidifying Paper

Miscellaneous patent data

Invented by Maaike Jacobine Esther Van Roosmalen et al., the patent particularly claims method for de-acidifying paper, comprising the steps of…, the claim 1 is exemplary as chosen by the examiner, the grant number is 08540848 (publication number), the published agent's organization is Renner, Otto, Boisselle & Sklar, LLP, the protection scope is defined by 12 claims, the grant publication date is Sep. 24, 2013, the invention is named Method and Device for a De-Acidifying Paper, was examined by Mark Halpern, the main examiner (1741 USPTO department), the application publication date is Sep. 17, 2008, the invention description is illustrated by 2 drawings, categorized under With coating or impregnating means (including printing) as a primary classification, the known applicant's name is Van Roosmalen Maaike Jacobine Esther, the application number is 12/678,364 (U.S.), explained by 2 figures, the inventor's name is Maaike Jacobine Esther Van Roosmalen, the exemplary patent drawings are schematic view of a device, Method and Device for a De-Acidifying, the patent grant was extended by 598 days, the assignee classification - a foreign company or corporation, similar patents are classified under Flexing, bending, straightening or decurling means, Cellulose, Derivatives thereof, suction means, modified by a particular after-treatment, vitreous, e.g. mineral wool, glass fibres, alkali metal, alkaline earth metal, or ammonium compound, Treating discontinuous paper, e.g. sheets, blanks, rolls, recovery means, Spraying or projecting, Recirculation skimming or excess stock take-off, located in Uden (NL), the assignee company is OmniAccess B.V.

Invention classification information

The invention is classified under Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only, With coating or impregnating means (including printing). The designated search classifications include Inorganic coating material, Organic base, Organic halide, Cellulosic base, Process of storage or protection, Modified condition of atmosphere, With coating or impregnating means (including printing), With Post-Treatment of Coating or Coating Material, Including rack, support or handling means.

Patent details
Publication number 08540848
Publication date Sep. 24, 2013
Kind code B2
Application number 12/678,364
Application date Sep. 17, 2008
Application type U
Application series code 12
Int. pub. country WO
Int. pub. number WO2009/038459
Int. publication Mar. 26, 2009
Int. filing country WO
Int. filing PCT/NL2008/050609
Filed internationally Sep. 17, 2008
National stage date Jul. 16, 2010
Extension term 598
National classification 162/265
Total number of claims 12
Exemplary claims 1
Number of drawings 2
Number of figures 2
Filed under rule 47
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