|
| US3969549 | 24. Dez. 1974 | 13. Juli 1976 | The United States of America as represented by the Librarian of Congress | Method of deacidifying paper |
| US4051276 | 23. Febr. 1976 | 27. Sept. 1977 | The United States Government as represented by the Librarian of Congress | Method of deacidifying paper |
| US5104997 | 20. Dez. 1990 | 14. Apr. 1992 | FMC Corporation | Mass treatment of cellulosic materials |
| US5277842 | 22. März 1993 | 11. Jan. 1994 | Battelle-Institut e.V. | Solvents for agents to mass deacidify books and other paper products in an environmentally safe manner |
| US5433827 | 21. Dez. 1993 | 18. Juli 1995 | Pulp and Paper Research Institute of Canada | Method for the deacidification of papers and books |
| US6080448 | 3. Apr. 1998 | 27. Juni 2000 | Preservation Technologies LP | Deacidification of cellulose based materials using hydrofluoroether carriers |
| US6214165 | 13. Juli 1999 | 10. Apr. 2001 | Joseph Zicherman Donald Perkins | Method for deacidification of papers and books by fluidizing a bed of dry alkaline particles |
| US6342098 | 12. Mai 2000 | 29. Jan. 2002 | Preservation Technologies LP | Deacidification of cellulose based materials using hydrofluoroether carriers |
| US6641877 | 2. März 2001 | 4. Nov. 2003 | | Article and method for retarding the deterioration rate of acidic paper |
| US6890455 | 23. Jan. 2004 | 10. Mai 2005 | The Sherwin-Williams Company | Archival spray composition |
| US6974632 | 28. Febr. 2005 | 13. Dez. 2005 | The Sherwin-Williams Company | Archival spray composition |
| US6984416 | 28. Febr. 2005 | 10. Jan. 2006 | The Sherwin-Williams Company | Archival spray composition |
| US7041236 | 28. Febr. 2005 | 9. Mai 2006 | The Sherwin-Williams Company | Archival spray composition |