Pharsight

Drug Patent Number	Company	Drug Patent Title	Drug Patent Expiry
These drug patents protects the active chemical substance. Only drug patent owner can launch products that use this active substance.
US9303051	CHIMERIX	Phosphonate ester derivatives and methods of synthesis thereof	Aug, 2031 (7 years from now)
US8962829	CHIMERIX	Morphic forms of hexadecyloxypropyl-phosphonate esters and methods of synthesis thereof	Oct, 2034 (11 years from now)
These drug patents focus on the other aspects of the active substance like dosage, mode of administration (oral, tablet, capsules, liquids etc).
US10112909	CHIMERIX	Morphic forms of hexadecyloxypropyl-phosphonate esters and methods of synthesis thereof	Oct, 2034 (11 years from now)
US10487061	CHIMERIX	Morphic forms of hexadecyloxypropyl-phosphonate esters and methods of synthesis thereof	Oct, 2034 (11 years from now)
US9371344	CHIMERIX	Morphic forms of hexadecyloxypropyl-phosphonate esters and methods of synthesis thereof	Oct, 2034 (11 years from now)