Patents by Inventor Richard C. Capozza

Richard C. Capozza has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Erodible device comprising surfactant for modifying the rate of erosion of the device
    Patent number: 4322323
    Abstract: An erodible device is disclosed for delivering an agent to an environment of use. The device comprises (1) a structure sized and adapted for placement in an environment of use, the structure comprising a poly(orthoester) or a poly(orthocarbonate) having a repeating mer consisting of hydrocarbon radical and a symmetrical dioxycarbon unit of the general formula: ##STR1## wherein R.sub.1 is a multivalent hydrocarbon radical, R.sub.2 and R.sub.3 are hydrocarbon radicals with at least one of R.sub.2 or R.sub.3 bonded to the dioxycarbon through an oxygen covalent bond, (2) a beneficial agent, and (3) a surfactant erosion rate modifier. The devices are useful for delivering numerous agents to many environments. A composition also is disclosed comprising a poly(orthoester) or a poly(orthocarbonate), and a surfactant.
    Type: Grant
    Filed: December 1, 1980
    Date of Patent: March 30, 1982
    Assignee: ALZA Corporation
    Inventor: Richard C. Capozza
  • Compositions comprising arylene substituted poly(orthoesters) containing useful agents
    Patent number: 4186185
    Abstract: This invention concerns polymeric orthoesters having a repeating mer comprising a hydrocarbon radical and an orthoester functionality of the general formula: ##STR1## wherein R.sub.1 is a monovalent radical, R.sub.2 is a hydrocarbon radical, a is 2 to 3, and n is at least 10. The polymers are useful for making articles of manufacture and as coatings for beneficial agents.
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: January 29, 1980
    Assignee: Alza Corporation
    Inventor: Richard C. Capozza
  • Fertilizer coated with orthoester polymer
    Patent number: 4155740
    Abstract: This invention concerns polymeric orthoesters having a repeating mer comprising a hydrocarbon radical and an orthoester functionality of the general formula: ##STR1## wherein R.sub.1 is a monovalent radical, R.sub.2 is a hydrocarbon radical, a is 2 to 3, and n is at least 10. The polymers are useful for making articles of manufacture and as coatings for beneficial agents.
    Type: Grant
    Filed: September 28, 1977
    Date of Patent: May 22, 1979
    Assignee: Alza Corporation
    Inventor: Richard C. Capozza
  • Polymeric orthoesters having arylene arrangement
    Patent number: 4136252
    Abstract: This invention concerns polymeric orthoesters having a repeating mer comprising a hydrocarbon radical and an orthoester functionality of the general formula: ##STR1## WHEREIN R.sub.1 is a monovalent radical, R.sub.2 is a hydrocarbon radica, a is 2 to 3, and n is at least 10. The polymers are useful for making articles of manufacture and as coatings for beneficial agents.
    Type: Grant
    Filed: September 28, 1977
    Date of Patent: January 23, 1979
    Assignee: Alza Corporation
    Inventor: Richard C. Capozza
  • Polymeric orthoesters housing beneficial drug for controlled release therefrom
    Patent number: 4066747
    Abstract: This invention concerns polymeric orthoesters having a repeating mer comprising a hydrocarbon radical and an orthoester functionality of the general formula: ##STR1## wherein R.sub.1 is a monovalent radical, R.sub.2 is a hydrocarbon radical, a is 2 to 3, and n is at least 10. The polymers are useful for making articles of manufacture and as coatings for beneficial agents.
    Type: Grant
    Filed: April 8, 1976
    Date of Patent: January 3, 1978
    Assignee: Alza Corporation
    Inventor: Richard C. Capozza