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Class Information
Number: 162/1
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material
Description: Processes for the liberation, recovery or purification of cellulose or of fibers as individual fibers or fibrous pulp occurring in a fibrous material by the use of a reagent which exerts some solvent or chemical action upon the fibrous material and the reagent compositions employed in such processes.
Sub-classes under this class:
| Class Number |
Class Name |
Patents |
| 162/2 |
Animal fibers |
3 |
| 162/52 |
Charging and/or discharging fibrous material |
165 |
| 162/24 |
Chemical treatment after start or completion of mechanical defibration |
69 |
| 162/17 |
Continuous chemical treatment or continuous charging or discharging |
124 |
| 162/21 |
Defibration by projection or explosion |
40 |
| 162/51 |
Digestion odor control |
33 |
| 162/54 |
Freezing |
3 |
| 162/63 |
Gas, vapor or mist contact |
70 |
| 162/14 |
Including recovery of organic by-product |
41 |
| 162/23 |
Mechanical defibration in the presence of heated gas or gas under pressure |
83 |
| 162/27 |
Mechanical defibration of logs or blocks after chemical treatment |
14 |
| 162/3 |
Mineral fibers |
19 |
| 162/69 |
Non-continuous liquid phase |
2 |
| 162/91 |
Particular raw cellulosic materials |
54 |
| 162/61 |
Regulatory |
67 |
| 162/26 |
Simultaneous mechanical defibration and chemical treatment |
79 |
| 162/70 |
Treatment with particular chemical |
54 |
| 162/50 |
Utilizing electrical or radiant energy |
47 |
| 162/53 |
Vacuum treatment |
13 |
| 162/4 |
Waste paper or textile waste |
345 |
| 162/57 |
With agitation or forced circulation |
150 |
| 162/9 |
With chemical or physical modification of liberated fiber |
231 |
| 162/55 |
With classifying, separating or screening of pulp (solids from solids) |
311 |
| 162/48 |
With cleaning, preserving or conditioning of apparatus |
46 |
| 162/20 |
With decortication or mechanical preparation of textile fibers |
15 |
| 162/13 |
With formation of web or article |
64 |
| 162/47 |
With heat recovery |
124 |
| 162/10 |
With non-fiber material added to product |
24 |
| 162/28 |
With plural or specified mechanical defibering step |
123 |
| 162/29 |
With regeneration, reclamation, reuse, recycling or destruction of digestion fluid |
263 |
| 162/56 |
With squeezing, compression, rubbing, kneading |
144 |
| 162/49 |
With testing, sampling or analyzing |
194 |
| 162/60 |
With washing |
267 |
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7503981 |
Removal of minerals from cellulosic biomass |
Mar. 17, 2009 |
| 7294228 |
Biopulp for non-woody fiber plants and biopulping method thereof |
Nov. 13, 2007 |
| 7138263 |
Endoglucanase enzyme NCE5 and cellulase preparations containing the same |
Nov. 21, 2006 |
| 6896810 |
Process for producing alkaline treated cellulosic fibers |
May. 24, 2005 |
| 6861519 |
Soluble highly branched glucose polymers and their method of production |
Mar. 1, 2005 |
| 6524435 |
Method and composition for dispersing hydrophobic particles in aqueous suspensions |
Feb. 25, 2003 |
| 6409841 |
Process for the production of organic products from diverse biomass sources |
Jun. 25, 2002 |
| 6270722 |
Stabilized bromine solutions, method of manufacture and uses thereof for biofouling control |
Aug. 7, 2001 |
| 6241802 |
Method for delivery of gas-enriched fluids |
Jun. 5, 2001 |
| 6190501 |
Electric double-layer capacitor and method of making a separator therefor |
Feb. 20, 2001 |
| 6027608 |
Conversion of avian feather-waste stream to useful products |
Feb. 22, 2000 |
| 5882427 |
Method of reconditioning used wood |
Mar. 16, 1999 |
| 5735934 |
Method for delivering a gas-supersaturated fluid to a gas-depleted site and use thereof |
Apr. 7, 1998 |
| 5705030 |
Fiber and fiber products produced from feathers |
Jan. 6, 1998 |
| 5691193 |
Non-chlorine bleaching of kraft pulp |
Nov. 25, 1997 |
| 5609724 |
Fungi for pitch reduction and their preparation |
Mar. 11, 1997 |
| 5597730 |
Process for the degradation of coal tar and its constituents by white rot fungi |
Jan. 28, 1997 |
| 5554535 |
White-rot fungus and uses thereof |
Sep. 10, 1996 |
| 5116746 |
Cellulase-free endo-xylanase enzyme of use in pulp delignification |
May. 26, 1992 |
| 5068023 |
Electrode arrangement |
Nov. 26, 1991 |
| 4891320 |
Methods for the degradation of environmentally persistent organic compounds using shite rot fungi |
Jan. 2, 1990 |
| 4891096 |
Process for biochemical retting of phloem-fiber plants |
Jan. 2, 1990 |
| 4874465 |
Tissue products containing sliced fibers |
Oct. 17, 1989 |
| 4830708 |
Direct biological bleaching of hardwood kraft pulp with the fungus Coriolus versicolor |
May. 16, 1989 |
| 4462319 |
Method and apparatus for safely controlling explosions in black liquor recovery boilers |
Jul. 31, 1984 |
| 4265675 |
Nontoxic cellulose solvent and process for forming and utilizing the same |
May. 5, 1981 |
| 4106978 |
Method of preventing explosions using a smelt water explosion inhibitor |
Aug. 15, 1978 |
| 4014788 |
Removing of bark fines from aqueous suspensions |
Mar. 29, 1977 |
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