D21H25/18 - CPC Classification Index

ClassID:

127073 ⎘

D21H25/18 - CPC Classification

Classification description:

After-treatment of paper not provided for in groups - of old paper as in books, documents, e.g. restoring

Recent Application in this class:

20210108362

2021-04-15

Composition for use in the finishing, preservation, restoration of manufactures

20200217009

2020-07-09

Liquid-state temporary reinforcing material, preparation method therefor and application thereof

20200157743

2020-05-21

Method for strengthening and reinforcing ancient books

20200157742

2020-05-21

Device for deacidifying, reinforcing and strengthening ancient books

20190390410

2019-12-26

Method and device for protecting paper sheet

20140356542

2014-12-04

Deacidification Treatments Of Printed Cellulosic Materials

20130302524

2013-11-14

Deacidification treatment of printed cellulosic materials

20110091641

2011-04-21

Method and device for a de-acidifying paper

20080017336

2008-01-24

Process For Preservation Of Cellulosic Materials

#10

20070187650

2007-08-16

Antioxidant for an organic material and method for treating the same

#11

20070111278

2007-05-17

Endoglucanase STCE and cellulase preparation containing the same

#12

20070022542

2007-02-01

Method to remove foxing stains from paper & celluloid items

#13

20060269706

2006-11-30

Sleeved tissue product

#14

20050147827

2005-07-07

Archival spray composition

#15

20050139809

2005-06-30

Archival spray composition

#16

20050139125

2005-06-30

Archival spray composition

#17

20050042380

2005-02-24

Basic suspension, its preparation and process for paper deacidification