Document aQyD1NeagGpg570zO37aOxRb

January 12, 1970 Mr. B. H. Neuwirth, Vice President Watson-Standard Company P. 0. Box 11250 Pittsburgh, Pa. 15238 Dear Hr. Heuwirthi In reply to your letter of December 29, 1989, at tached is out brochure entitled "Sand Orlading Process For Dispersing Pigments". This is the only brochure we have available on this subject. Du Post's sand grinding patent licensing program expired on January 8, 1969 with the expiration of 0.8. Patent 2,581,414. Ho license is required for the terminal portion of U.S. Patent 2,855,156. Very truly yours, A. B. M. A. B. Haselow Patents & contracts Section ABH/bn Attach, N38494