UNITED STATES PATENTS RELATING TO ENAMELS 



WITH SPECIAL REFERENCE TO ENAMELS FOR 



IRON AND STEEL 



The following pages contain a list of the United States patents 

 relative to enamels, with special reference to those for iron and 

 steel for the period 1900-1920. These are arranged chronologi- 

 cally. Wherever possible reference is given to Chemical Ab- 

 stracts, where a more complete abstract of the patent may usually 

 be found. Reference is also made (the figures in parentheses), 

 to the Official Gazette of the U. S. Patent Office, where the more 

 important, if not all, the claims of the patents are printed. Printed 

 copies of patents are furnished at 10 cents each by the Commis- 

 sioner of Patents, Washington, D. C. 



640,844. Charles H. Watermann. Process of enameling. Jan. 9, 1900. 

 (90, 279). 



645,393. Edward C. Hoelscher and John Clifford. Enameling table or 

 machine. Mar. 13, 1900. (90, 2076). 



645,517. Christian A. Sievert. Enameling table. Mar. 13, 1900. (90, 

 2121). 



658,833. Edward Dithridge. Enameling table for bath tubs. Oct. 2, 

 1900. (93, 45). 



663,601. William C. Degelman. Apparatus for enameling bath tubs. 

 Dec. n, 1900. (93, 1911)- 



663,618. Wilbur Topping. Composition for enameling metal ware. 

 Dec. n, 1900. (93, 1996). 



The formula used was: 61 parts borax, 71 parts feldspar, 44 parts quartz, 

 15 parts fluorspar, 14 parts soda, n parts saltpeter and water. 



664,321. Josiah Hughes and James F. McGowan. Ornamental enamel 

 ware. Dec. 18, 1900. (93, 2285). 



Variegated enamel ware, the surface of which comprises a body having 

 incorporated and fused therein an enameling material of different color. 



669,567. Charles H. Watermann. Apparatus for enameling surfaces of 

 refractory material. Mar. 12, 1901. (94, 1999). 



674,506. Joseph H. Hines. Process of enameling metal surfaces. May 

 21, 1901. (95, 1509). 



