Patents by Inventor Rahul R. Khanwelkar

Rahul R. Khanwelkar 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).

  • Articles comprising benzopyran colorants, method of manufacture, and method of use
    Patent number: 7351461
    Abstract: An article comprising the compound of Formula (I) wherein X is hydrogen or a radical of Formula (II), R1 independently at each occurrence is a C1-C20 aliphatic radical, a C3-C10 cycloaliphatic radical, or a C3-C10 aromatic radical; R2, R3, R4 and R5 are independently at each occurrence a halogen, a nitro group, a cyano group, a hydroxy group, a C1-C20 aliphatic radical, a C3-C20 cycloaliphatic radical, or a C6-C20 aromatic radical; and “n”, “q”, and “p” are each independently integers having a value of 0 to 3, and “m” is an integer having a value of 0 to 4.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: April 1, 2008
    Assignee: General Electric Company
    Inventors: Yogendrasinh B. Chauhan, Adil Minoo Dhalla, Rahul R. Khanwelkar, Krishnamoorthy Sivakumar, Kiran Arunkumar Puthamane
  • Benzopyran colorants, method of manufacture, and method of use
    Patent number: 7270772
    Abstract: A compound of Formula (I) wherein X is hydrogen or a radical of Formula (II), R1 independently at each occurrence is a C1–C20 aliphatic radical, a C3–C10 cycloaliphatic radical, or a C3–C10 aromatic radical; R2, R3, R4 and R5 are independently at each occurrence a halogen, a nitro group, a cyano group, a hydroxy group, a C1–C20 aliphatic radical, a C3–C20 cycloaliphatic radical, or a C6–C20 aromatic radical; and “n”, “q”, and “p” are each independently integers having a value of 0 to 3, and “m” is an integer having a value of 0 to 4.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: September 18, 2007
    Assignee: General Electric Company
    Inventors: Yogendrasinh B. Chauhan, Adil Minoo Dhalla, Rahul R. Khanwelkar, Krishnamoorthy Sivakumar, Kiran Arunkumar Puthamane