PATENTS

1."Corrosion Inhibitor and Method of Using the Same," S.J. Buckman, J.D. Pera, and W.P. Purcell (to Buckman Laboratories, Inc.), United States 3,137,613; patented June 16, 1964.

2."Corrosion Inhibitor and Method of Using the Same," S.J. Buckman, J.D. Pera, and W.P. Purcell (to Buckman Laboratories, Inc.), United States 3,199,989; patented August 10, 1965.

3."Pitch Control in Pulp and Paper Making," S.J. Buckman, J.D. Pera, and W.P. Purcell (to Buckman Laboratories, Inc.), United States 3,274,050; patented September 20, 1966.  Twenty foreign patents issued.

4."Nouveaux Dérives de la Benzamide," W.P. Purcell and H.A. Parish (to Applifarm SA), Classification des Brevets A61K31/63;Co7C119/06,143/80;A61K31/165; patented August 9, 1979.

5."Pyridopyrimidinone Derivatives," W.P. Purcell, R.D. Gilliom, and H.A. Parish (to J.S. Waldron, Esq.), United States 4,361,700: patented November 30, 1982.

6."Topical Prodrugs for Treatment of Acne and Skin Diseases," H.A. Parish and W.P. Purcell (to Molecular Design International, Inc.), United States 4,677,120; patented June 30, 1987.

7."Topical Transretinoids for Treatment of Acne and Skin Diseases," H.A. Parish and W.P. Purcell (to Molecular Design International, Inc.), United States 4,885,311; patented December 5, 1989.

8."9-CIS Retinoic Acid Esters and Amides and Uses Thereof," W. P. Purcell (to Molecular Design International, Inc.), United States 5,837,728; patented November 17, 1998.