Patents by Inventor Vish Rai

Vish Rai 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).

  • Chromatography column
    Patent number: 4986909
    Abstract: A chromatography column for effecting chromatographic separation of at least two components of a sample flowing through the column. The column comprises a housing and at least one solid stationary phase within the housing. The stationary phase has chromatographic functionality and is effective for chromatographic separation. Means are provided for distributing the sample through the stationary phase and for collecting the sample after the sample has flowed through the stationary phase. The stationary phase comprises:(a) a plurality of layers of swellable fibrous matrix in sheet form having chromatographic functionality and being effective for chromatographic separation; and(b) a spacer means between each layer for permitting controlled swelling thereof and enhancing the distribution of sample flowing through the stationary phase.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: January 22, 1991
    Assignee: Cuno Incorporated
    Inventors: Vish Rai, Nils Dailey, Kenneth Southall, Timothy Webster, Gordon Leeke, Chaokang Chu
  • Chromatography column
    Patent number: 4743373
    Abstract: A chromatography column for effecting chromatographic separation of at least two components of a sample flowing through the column. The column comprises a housing and at least one solid stationary phase within the housing. The stationary phase has chromatographic functionality and is effective for chromatographic separation. Means are provided for distributing the sample through the stationary phase and for collecting the sample after the sample has flowed through the stationary phase. The stationary phase comprises:(a) a plurality of layers of swellable fibrous matrix in sheet form having chromatographic functionality and being effective for chromatographic separation; and(b) a spacer means between each layer for permitting controlled swelling thereof and enhancing the distribution of sample flowing through the stationary phase.
    Type: Grant
    Filed: September 4, 1986
    Date of Patent: May 10, 1988
    Assignee: Cuno Incorporated
    Inventors: Vish Rai, Nils Dailey, Kenneth Southall, Timothy Webster, Gordon Leeke, Chaokang Chu
  • Chromatography column
    Patent number: 4675104
    Abstract: A chromatography column for effecting chromatographic separation of at least two components of a sample flowing through the column. The column comprises a housing and at least one solid stationary phase within the housing. The stationary phase has chromatographic functionality and is effective for chromatographic separation. Means are provided for distributing the sample through the stationary phase and for collecting the sample after the sample has flowed through the stationary phase. The stationary phase comprises:(a) a plurality of layers of swellable fibrous matrix in sheet form having chromatographic functionality and being effective for chromatographic separation; and(b) a spacer means between each layer for permitting controlled swelling thereof and enhancing the distribution of sample flowing through the stationary phase.
    Type: Grant
    Filed: April 16, 1985
    Date of Patent: June 23, 1987
    Assignee: Cuno Inc.
    Inventors: Vish Rai, Kenneth Southall, Timothy Webster, Gordon Leeke, Chaokang Chu