|
| US4051276 | 23 Feb 1976 | 27 Sep 1977 | The United States Government as represented by the Librarian of Congress | Method of deacidifying paper |
| US4522843 | 25 Ene 1984 | 11 Jun 1985 | | Deacidification of library materials |
| US5232745 | 1 Mar 1991 | 3 Ago 1993 | Manville Corporation | Method of neutralizing acid containing compositions present in an insulation board |
| US5409736 | 31 Ago 1993 | 25 Abr 1995 | Preservation Technologies, Inc. | Deacidification of cellulose based materials using perfluorinated carriers |
| US5433827 | 21 Dic 1993 | 18 Jul 1995 | Pulp and Paper Research Institute of Canada | Method for the deacidification of papers and books |
| US5525296 | 9 Nov 1993 | 11 Jun 1996 | William K. Hollinger, Jr. Conservation Resources International, Inc. | Article and method for archival preservation with an organophilic, hydrophobic or acid-resistant molecular sieve |
| US5633054 | 30 Mar 1992 | 27 May 1997 | Conservation Resources International, Inc. | Archival materials and packaging |
| US5683662 | 5 Jun 1995 | 4 Nov 1997 | Conservation Resources International, Inc. | Article and method for archival preservation with an organophilic, hydrophobic or acid-resistant molecular sieve |
| US5693384 | 16 Mar 1993 | 2 Dic 1997 | Conservation Resources International, Inc. | Article and method for preserving an archival article |
| US5714120 | 5 Jun 1995 | 3 Feb 1998 | Conversation Resources International, Inc. | Method for preserving an archival document or object |
| US6080448 | 3 Abr 1998 | 27 Jun 2000 | Preservation Technologies LP | Deacidification of cellulose based materials using hydrofluoroether carriers |
| US6214165 | 13 Jul 1999 | 10 Abr 2001 | Joseph Zicherman Donald Perkins | Method for deacidification of papers and books by fluidizing a bed of dry alkaline particles |
| US6342098 | 12 May 2000 | 29 Ene 2002 | Preservation Technologies LP | Deacidification of cellulose based materials using hydrofluoroether carriers |
| US6428881 | 17 Sep 1999 | 6 Ago 2002 | Rupaco Paper Corporation | Matboard/backing board and methods of manufacture and use |
| US6641877 | 2 Mar 2001 | 4 Nov 2003 | | Article and method for retarding the deterioration rate of acidic paper |
| US6645298 | 5 Ene 2001 | 11 Nov 2003 | Ruag Munition | Active substance and device for the deacidification of printed matter |