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Class 162 - Paper making and fiber liberation

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450 Subclasses


Subclasses list

Definition

This class includes:

A. Processes for the liberation, recovery or purification of fibers as individual staple fibers or as a pulp of such fibers, including cellulosic fibers, from a fibrous containing material by use of a reagent which exerts some chemical or solvent action upon the fibrous material.

B. Reagent compositions employed in the processes "A" above, and processes of preparation of such compositions, not otherwise provided for;

C. Processes including the deposition of fibers from a liquid suspension thereof in order to form an interfelted product and processes of treatment of the deposited fibrous product prior to the final drying thereof;

D. Fibrous pulps and deposited fibrous webs or articles which are produced by processes "A" or "C" above, which are not otherwise provided for;

E. In addition to the products set forth in "D," this class also includes any nonstructural fiber or fiber containing product (e.g., particular fiber blend) manufactured by any other process (e.g., airlaid) where not elsewhere provided for. See Subclass References to the Current Class, below, and also see References to Other Classes, below, for classes that refer to this section.

F. Apparatus employed in carrying out processes "A" and "C" above, not otherwise provided for;

G. An endless Fourdrinier wire is provided for in this class.

Lines with other classes and within this class

A. FIBER PREPARATION OR TREATING PROCESSES

Within this class processes of fiber preparation are classified in subclass 1. This portion of the class is concerned with the treating of fiber and fibrous materials with chemicals for the purpose of making a pulp or suspension of individual staple fibers which may be deposited from a liquid suspension thereof, thus forming an interfelted fibrous product (paper) or the fibers may be employed for textile purposes.

This class provides for the chemical liberation of these fibers as well as the purification or refining, bleaching, etc., of the fibers with a reagent which exerts some chemical action.

LINE WITH CLASS 8 AND CLASS 19

This class is related to Class 8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers, and Class 19, Textiles: Fiber Preparation, which also provide for fiber treating processes. Class 8 provides for processes of fluid treatment and chemical modification of textiles and fibers not elsewhere provided for. With respect to pulps and suspension of individual fibers the line with Class 8 is as follows:

Class 162 takes (1) processes involving liberating, purifying, bleaching or refining such fibers, (2) processes in which the fibers are modified by hydration, mercerizing or parchmentizing; Class 8 takes all processes of chemically modifying such fibers other than by hydration, mercerization or parchmentizing. Class 162 (in subclass 100 particularly subclass 162) also takes dyeing of such fibers.

Class 8 provides for purifying, bleaching, etc., of fabrics, strands, yarns, filaments, etc., as distinguished from fibrous pulps. Patents to processes in which both a fibrous pulp and a fabric, strand, yarn, etc., is claimed (or disclosed if claimed only generically) are classified in Class 8. Combinations of a step of purifying or liberating the fiber with a step of modifying it, per se, belonging in Class 8, are classified in Class 162.

Class 8, particularly in subclasses 137+ and 147+, provides for the cleaning and laundering of textile fabrics and fibers, that is, for the removal of materials not originally associated with a natural fiber and the removal of any material from synthetic fibers. The treatment may be effected with or without chemical action. Thus, manipulative processes of washing pulp or fibers in bulk form are classified in Class 8, subclass 156.

Class 19 provides for the mechanical treatment of fibers to put them in condition for use.

See References to Other Classes, below, for related fiber preparation or treating processes classes.

B. FIBER TREATING AGENTS

Chemical reagent compositions used for liberating fiber from a fiber containing material (e.g., wood) are included and are classified with the corresponding process. This class provides also for processes of making or regenerating such agents. Also see Subclass References to the Current Class and References to Other Classes, below.

C. FIBROUS PRODUCT MAKING AND TREATING

This class includes processes of forming an interfelted fibrous product by deposition from liquid suspension including the addition of other material to the fibrous suspension whether the deposition step is included or not. This class also includes processes for treating the deposited web or article prior to final drying thereof. The fibrous character of the product must be retained in the final product. Also see Subclass References to the Current Class and References to Other Classes, below.

D. COMBINATIONS WITH OTHER PAPER TREATING OPERATIONS

This class generally includes combinations of a fiber liberation or purification step with other fiber treating steps or of a deposition from a liquid suspension with other treatment of the interfelted product (in which the fibrous nature of the product is retained). Processes of fiber liberation or purification combined with processes of employing the liberated fibers for the manufacture of a product (other than by deposition from a fiber suspension) are, in general, classified in the class providing for the particular manufacturing operation involved. See References to Other Classes, below.

E. PRODUCTS

This provides for paper products resulting from processes classified herein. However, articles and materials having structure or other characteristics provided for in other classes are classified therein, even though made of paper, or disclosed or claimed as having been made by a process classifiable herein. Also see References to Other Classes, below.

F. APPARATUS

This class includes apparatus employed for carrying out processes classifiable herein not otherwise provided for. Also see Subclass References to the Current Class and References to Other Classes, below.

 
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