(under subclass 411.1) Product in which at least one layer contains either a polyhydroxy mono-aldehyde or a polyhydroxy mono-ketone, generally having the formula i.e., Cn(H2O)n or one of the multi-unit anhydrides which are hydrolizable to such aldehyde and/or ketone.
(1) Note. Patents claiming a laminate including a layer of starch*, glycogen, dextran*, lignin, etc., will be collected here.
(2) Note. Pyroxylin has a minor amount of camphor and/or castor oil as a plasticizer, but for purposes of classification is considered carbohydrate (specifically cellulosic*) rather than a natural gum or oil, and patents claiming a laminate of such a layer will be placed in this and indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
26, for a three dimension imitation or treated natural product resembling a flower and made of paper.
50, for a single layer of cellulosic sections arranged in both lateral and longitudinal directions.
84, for a paper sheet having specific perimeter or corner structure. 146, for a surface containing carbohydrate particles to give a textured feel.
153+, for a web* or sheet* comprising crinkled or creped paper.
165, for a composite* web* or sheet* in which one of the layers* or components* varies in thickness and at least one component* comprises cellulosic material.
191, for a web* or sheet* comprising plural components*, noncoextensive laterally and in which one component is cellulosic material.
211, for a paper sheet* having a discontinuous or differential coating, bond or impregnation.
314, for a composite*, web* or sheet*, one component* of which is porous or cellular* and is made of expanded or foamed material and is adjacent to a cellulosic layer.
318, for a similar composite*, web* or sheet* in which the porous or cellular* component* contains fiber* and as paper.
326, for a composite*, web* or sheet* in which one component* contains structurally defined particles* of cellulosic material.
342, for a web* or sheet* in which the weight of a coating on a cellulosic substrate is recited in terms of an area covered thereby.
393, for a coated or structurally defined rod* strand*, fiber* or filament* of cellulosic material.
411+, appropriate subclasses with cellulosic or carbohydrate set out in the titles for a composite* web* or sheet* including a cellulosic or carbohydrate component. 455+, for a laminated product including cork* (the outer bark of cork oak).
SEE OR SEARCH CLASS
442, Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, etc.),
153, for a coated or impregnated cellulosic fiber fabric and subclass 257 for a fabric including a wood or cork layer.
