Patents by Inventor Francis Michelotti

Francis Michelotti 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).

  • Aqueous stripping and cleaning compositions
    Patent number: 5997658
    Abstract: An aqueous stripping composition comprising a mixture of an organic amine and a corrosion inhibitor which is benzotriazole alone or in combination with gallic acid, its ester or analog. The stripping composition is effective to strip photoresists, residues from plasma process generated organic, metal-organic materials, inorganic salts, oxides, hydroxides or complexes in combination with or exclusive of organic photoresist films at low temperatures with little corrosion of copper or titanium containing substrates.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: December 7, 1999
    Assignee: Ashland Inc.
    Inventors: Darryl W. Peters, Irl E. Ward, Francis Michelotti, Floyd Riddle, Jr.
  • Aqueous stripping and cleaning compositions
    Patent number: 5988186
    Abstract: An aqueous stripping composition comprising a mixture of a polar amine, an organic or inorganic amine and a corrosion inhibitor which is gallic acid, its ester or analog. The stripping composition is effective to strip photoresists, residues from plasma process generated organic, metal-organic materials, inorganic salts, oxides, hydroxides or complexes in combination with or exclusive of organic photoresist films at low temperatures without redepositing any substantial amount of metal ions.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: November 23, 1999
    Assignee: Ashland, Inc.
    Inventors: Irl E. Ward, Francis Michelotti
  • Aqueous stripping and cleaning compositions containing hydroxylamine and use thereof
    Patent number: 5928430
    Abstract: An aqueous stripping composition comprising a mixture of about 55% to 70% by weight of a polar amine solvent, about 22.5 to 15% by weight of a basic amine, especially hydroxylamine, a corrosion inhibitor and water. The stripping composition is effective for stripping photoresists, residues from plasma process generated organic, metal-organic materials, inorganic salts, oxides, hydroxides or complexes in combination with or exclusive of organic photoresist films at low temperatures.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: July 27, 1999
    Assignee: Advanced Scientific Concepts, Inc.
    Inventors: Irl E. Ward, Francis Michelotti
  • Purification of hydroxylamine
    Patent number: 5872295
    Abstract: The invention provides a method for purification of hydroxylamine so as to have a substantial reduction of cations and anions. The method involves passing a solution of hydroxylamine through at least one strong acid ion exchange bed which has been pretreated with dilute hydrochloric acid and then through at least one strong base anion exchange resin bed which has been pretreated or regenerated with a non-metal amino or hydroxide base solution.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: February 16, 1999
    Assignee: Concept Sciences, Inc.
    Inventors: Francis Michelotti, Irl E. Ward
  • Stripping and cleaning composition
    Patent number: 5571447
    Abstract: A stripping and cleaning composition is provided which contains a polyhydric alcohol, fluoboric acid, a fluorine containing compound and a polar solvent. The pH of the composition is less than 5. Also provided is a method of stripping and cleaning utilizing the compositions of the invention.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: November 5, 1996
    Assignee: Ashland Inc.
    Inventors: Irl E. Ward, Francis Michelotti, Leslie D. Molnar