No 4,690,825, granted Sept. 1, 1987 to Richard Won, Method for Delivering {HEAD ~ an Active Ingredient} by {TAIL ~ Controlled Time Release} Utilizing a Novel Delivery Vehicle which can be Prepared by a Process Utilizing the Active Ingredient as a Porogen 
No 4,690,825 , granted Sept. 1 , 1987 to Richard Won , Method for Delivering { HEAD ~ an Active Ingredient } by { TAIL ~ Controlled Time Release } Utilizing a Novel Delivery Vehicle which can be Prepared by a Process Utilizing the Active Ingredient as a Porogen
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH