Patents by Inventor Samarendra Nath Maiti

Samarendra Nath Maiti 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).

  • Cephem compounds, their production and use
    Patent number: 9751894
    Abstract: Cephem compounds, pharmaceutically acceptable salts thereof, and methods of using same, wherein the compound has a bicyclic nitrogen-containing aromatic heterocyclic ring as the quaternary ammoniomethyl group at the 3-position and one or both of a terminal amidine residue (substituted or unsubstituted) attached to an aryl or a 5- or 6-membered heteroaryl group (substituted or unsubstituted) which is further attached through a spacer to the free N-atom of the quaternary nitrogen-containing bicyclic ring at the 3-side chain, or a terminal guanidine residue attached to an aryl or a 5- or 6-membered heteroaryl group (substituted or unsubstituted) which is further attached through a spacer to the free N-atom of the quaternary nitrogen-containing bicyclic ring at the 3-side chain.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: September 5, 2017
    Assignee: NAEJA-RGM PHARMACEUTICALS INC.
    Inventors: Samarendra Nath Maiti, Dai Quoc Nguyen, Andhe V. N. Reddy, Judy Yip, Chan Minh Ha, Rong Ling, Rudong Shan, Madhava Reddy Madala
  • CEPHEM COMPOUNDS, THEIR PRODUCTION AND USE
    Publication number: 20170166587
    Abstract: Cephem compounds, pharmaceutically acceptable salts thereof, and methods of using same, wherein the compound has a bicyclic nitrogen-containing aromatic heterocyclic ring as the quaternary ammoniomethyl group at the 3-position and one or both of a terminal amidine residue (substituted or unsubstituted) attached to an aryl or a 5- or 6-membered heteroaryl group (substituted or unsubstituted) which is further attached through a spacer to the free N-atom of the quaternary nitrogen-containing bicyclic ring at the 3-side chain, or a terminal guanidine residue attached to an aryl or a 5- or 6-membered heteroaryl group (substituted or unsubstituted) which is further attached through a spacer to the free N-atom of the quaternary nitrogen-containing bicyclic ring at the 3-side chain.
    Type: Application
    Filed: December 5, 2016
    Publication date: June 15, 2017
    Inventors: Samarendra Nath MAITI, Dai Quoc NGUYEN, Andhe V.N. REDDY, Judy YIP, Chan Minh HA, Rong LING, Rudong SHAN, Madhava Reddy MADALA
  • Penam sulfones as .beta.-lactamase inhibitors
    Patent number: 5686441
    Abstract: Novel 3-(substituted)-3-methyl-4-thia-1-azabicyclo?3.2.0!heptane-2-carboxylate, 4,4-dioxides which are of value for use in combination with .beta.-lactam antibiotics to increase the effectiveness of the antibiotics.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: November 11, 1997
    Assignees: Syphar Laboratories, Inc., Taiho Pharmaceutical Co., Ltd.
    Inventors: Samarendra Nath Maiti, Oludotun Adebayo Phillips, Andhe Venkat Narender Reddy, Eduardo Luis Setti, Ronald George Micetich, Chieko Kunugita, Fusahiro Higashitani, Akio Hyodo
  • Cephem compounds, their production and use
    Patent number: RE48097
    Abstract: Cephem compounds, pharmaceutically acceptable salts thereof, and methods of using same, wherein the compound has a bicyclic nitrogen-containing aromatic heterocyclic ring as the quaternary ammoniomethyl group at the 3-position and one or both of a terminal amidine residue (substituted or unsubstituted) attached to an aryl or a 5- or 6-membered heteroaryl group (substituted or unsubstituted) which is further attached through a spacer to the free N-atom of the quaternary nitrogen-containing bicyclic ring at the 3-side chain, or a terminal guanidine residue attached to an aryl or a 5- or 6-membered heteroaryl group (substituted or unsubstituted) which is further attached through a spacer to the free N-atom of the quaternary nitrogen-containing bicyclic ring at the 3-side chain.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: July 14, 2020
    Assignee: NAEJA-RGM PHARMACEUTICALS ULC
    Inventors: Samarendra Nath Maiti, Dai Quoc Nguyen, Andhe V. N. Reddy, Judy Yip, Chan Minh Ha, Rong Ling, Rudong Shan, Madhava Reddy Madala