Rossiter v. Ellis

The appellant, Edmund C. Rossiter, filed his application in the United States Patent Office, serial No. 145,369, on October 30, 1926, *794for patent upon a process for the manufacture of artificial resins. This application discloses a process wherein thiourea is dissolved in an aqueous solution of formaldehyde and heated to between 60° and 70° C. The specification further discloses that such a solution remains clear for a considerable period, but that the properties of the product obtained after drying render the use of accelerators desirable during the subsequent moulding with heat; that with a…