US PATENT SUBCLASS 162 / 141
.~ Plural fiber containing

Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

100  DF  PROCESSES AND PRODUCTS {31}
141.~ Plural fiber containing {7}
142  DF  .~.~> Undigested cellulosic fiber
143  DF  .~.~> Animal or proteinaceous {1}
145  DF  .~.~> Mineral
146  DF  .~.~> Synthetic (including chemically modified cellulose)
147  DF  .~.~> Waste paper or textile waste
148  DF  .~.~> Non-wood
149  DF  .~.~> Fibers of different dimensions

DEFINITION

Classification: 162/141

(under subclass 100) Processes involving the deposition of fibers from a liquid suspension containing a plurality of different types of fibers, so as to form a single layer (web or article) in which the different fibers are homogeneously distributed, and the resulting products.

(1) Note. Different types of fibers must be deposited to form the product to justify classification of processes and products in this or indented subclass. Thus, this group excludes processes of treating a slurry of two types of fibers in such a way that one type is gelatinized to the point where it completely loses its fibrous nature.

(2) Note. This subclass (141) contains processes of forming pulps or paper products from mixtures of pulps from different wood sources, as well as pulps derived from different chemical treatments of the same or different woods, e.g., a mixture of kraft and sulfite pulps.

(3) Note. This subclass includes the products under "E." of the class definition of this class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

188, for processes of producing a web or article having a nonuniform distribution of mixed fibers, and the resulting products, as where coarse fibers are concentrated at one portion, and fine fibers at another, with or without a gradual transition in respective fiber content at intermediate points.

SEE OR SEARCH CLASS 428, Stock Material Miscellaneous Articles, appropriate subclasses, for a fiber or fiber containing single or plural layer stock material product with either internal structure (e.g., crimped fiber), or external structure (e.g., corrugated sheet), where the sole disclosed method of manufacture is some process (e.g., air-laying), other than a process of fiber deposition from a liquid suspension.