Patents by Inventor Geetha Surendran

Geetha Surendran 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).

  • Photoresist strippers containing reducing agents to reduce metal corrosion
    Patent number: 6749998
    Abstract: Alkaline photoresist stripping compositions containing a reducing agent to reduce or inhibit metal corrosion are disclosed. Reducing agents include compounds containing reactive multiple bonds, hydrazine and derivatives thereof, oximes, hydroquinone, pyrogallol, gallic acid and esters thereof, tocopherol, 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid, BHT, BHA, 2,6-di-tert-butyl-4-hydroxymethyl-phenol, thiols, salicylaldehyde, 4-hydroxybenzaldehyde and glycol aldehyde dialkylacetals.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: June 15, 2004
    Assignee: Mallinckrodt Baker Inc.
    Inventors: George Schwartzkopf, Geetha Surendran
  • Photoresist strippers containing reducing agents to reduce metal corrosion
    Publication number: 20020037479
    Abstract: Alkaline photoresist stripping compositions containing reducing agent to reduce or inhibit metal corrosion. Reducing agents include compounds containing reactive multiple bonds, hydrazine and derivatives thereof, oximes, hydroquinone, pyrogallol, gallic acid and esters thereof, tocopherol, 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid, BHT, BHA, 2,6-di-tert-butyl-4-hydroxymethyl-phenol, thiols, salicylaldehyde, 4-hydroxybenzaldehyde and glycol aldehyde dialkylacetals.
    Type: Application
    Filed: October 2, 2001
    Publication date: March 28, 2002
    Applicant: Mallinckrodt Baker, Inc.
    Inventors: George Schwartzkopf, Geetha Surendran
  • Photoresist strippers containing reducing agents to reduce metal corrosion
    Patent number: 6326130
    Abstract: Alkaline photoresist stripping compositions containing reducing agent to reduce or inhibit metal corrosion. Reducing agents include compounds containing reactive multiple bonds, hydrazine and derivatives thereof, oximes, hydroquinone, pyrogallol, gallic acid and esters thereof, tocopherol, 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid, BHT, BHA, 2,6-di-tert-butyl-4-hydroxymethyl-phenol, thiols, salicylaldehyde, 4-hydroxybenzaldehyde and glycol aldehyde dialkylacetals.
    Type: Grant
    Filed: October 7, 1993
    Date of Patent: December 4, 2001
    Assignee: Mallinckrodt Baker, Inc.
    Inventors: George Schwartzkopf, Geetha Surendran