86 F.2d 850 | D.D.C. | 1936
Appeal from a decree in the Supreme Court of the District (now District Court of the United States) dismissing appellant’s bill filed under section 4915, R.S., as amended (35 U.S.C.A. § 63), to authorize the Commissioner of Patents to issue a patent to appellant (assignee of applicants Cherry and Kurath).
The case involves a thermoplastic molding composition, a process of molding it, and the finished molded article.
Of the claims, Nos. 8 to 13, inclusive, claim 8 for the composition is sufficiently illustrative, and is here reproduced:
“8. A thermoplastic molding composition comprising a thermoplastic reactive resinous binder and a filler consisting of relatively short lengths of spun fibrous material in string-like ;form.”
In its brief appellant states that “molding compositions of this general type are well known and there are many such compositions now employed in' various industrial uses for making numerous objects. Such compositions have resulted from the development of certain synthetic resinous materials which are suitable for use as the binders thereof.” The binder used as an ingredient of appellant’s molding composition “is any one of the resins of the group above referred to, which are thermoplastic as well as potentially reactive.”
The other essential ingredient is the filling material. That employed by appellant is composed of relatively short lengths (approximately one-eighth of an inch to two inches in length) of strong pieces of string, or, as specified in claim 9, consists of “relatively short lengths of spun fibrous material in string-like form.”
The patent to Talley, No. 1,223,216, discloses a molded gear composed of a resinous binder and a filler of unspun fibrous material. In his specification he states: “Many kinds of fibrous materials are suitable for my purpose, such as long and short staple raw cotton, hemp and other textile fibers, as well as certain varieties of long-filler asbestos.”
Kempton, No. 1,513,323, discloses a mold-able composition. In his specification he points out that a moldable body composed of a comminuted filler such as wood flour (fine sawdust), or a short-fiber filler, does not possess sufficient strength for some purposes, although the strength is uniform; that a body composed of superimposed layers of fibrous sheet material and a hardened phenolic condensation product possesses unusually great mechanical strength in one direction but not as great strength as is required, in some instances, in an opposite direction; that the sheet material may be conveniently formed into bodies of uniform thickness only. He then states: “To overcome these objections, attempts have been made, by various methods, to provide a moldáble composition comprising long fibres, and particularly long cotton fibres, impregnated with a suitable binder, such as a phenolic condensation product, as it has been appreciated that a body molded from such material would possess uniform strength, in all directions, and a strength considerably exceeding that of moldable compositions having a granular or short-fibre filler. * * * I have found that woven fabrics, in sheet form, such as various forms of cloth, may be readily and uniformly impregnated with a phenolic condensation product,
Smith, patent No. 1,557,730, uses a string impregnated with a resinous binder, and then takes the impregnated string and packs it indiscriminately in the mold.
The Patent Office was of the view that the use of “relatively short lengths of spun fibrous material in stringlike form” as a reinforcing filler for a plastic composition in place of Talley’s long fibres, Kempton’s shredded canvas, or Smith’s long pieces of string, involved “a mere carrying forward or new or more extended application of the original thought, a change only in form, proportions, or degree.” Smith v. Nichols, 88 U.S.(21 Wall.) 112, 119, 22 L.Ed. 566.
While appellant has produced a mold-able composition of greater strength than that of Kempton and greater moldability than that of Smith, we are constrained to rule that the result obtained was merely a change in degree.
The decree, therefore, must be affirmed.
Affiimed.
