(under subclass 221) Product in which is recited the weight of a material related to its area.
(1) Note. The "material" may be a web, sheets component, base*, coating, layer or element.
(2) Note. Some examples of terms used are: pounds per square meter, grams per square centimeter, pounds per square foot, grams per quire of certain size paper, etc.
(3) Note. This is excluded from subclasses 332+ even though the thickness can be calculated if the density of the material be known.
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332+, for an element or component recited in terms of its actual physical dimension in units of length (e.g., mils, inches, microns, etc.).
