Patents by Inventor Uttam Saha

Uttam Saha 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).

  • Patent number: 11926583
    Abstract: A stabilized 1,25-dihydroxyvitamin D2 composition which is particularly well suited for pharmaceutical formulations, pharmaceutical formulations of the 1,25-dihydroxyvitamin D2 composition, and a method of making the purified composition by purifying a crude 1,25-dihydroxyvitamin D2 from acetone/water, are disclosed.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: March 12, 2024
    Assignee: EIRGEN PHARMA LTD.
    Inventor: Uttam Saha
  • Patent number: 11795148
    Abstract: Compounds that are inhibitors of retinoic acid inducible P450 (CYP26) enzymes. The compounds have retinoid activity, are resistant to CYP26-mediated catabolism, act as inhibitors of CYP26B1, and are used for treating diseases that are responsive to retinoids.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: October 24, 2023
    Assignee: Queen's University at Kingston
    Inventors: Donald Andrew Cameron, Martin Petkovich, Uttam Saha
  • Patent number: 11358933
    Abstract: Compounds that are inhibitors of retinoic acid inducible P450 (CYP26) enzymes. The compounds have retinoid activity, are resistant to CYP26-mediated catabolism, act as inhibitors of CYP26B1, and are used for treating diseases that are responsive to retinoids.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: June 14, 2022
    Assignee: Queen's University at Kingston
    Inventors: Donald Andrew Cameron, Martin Petkovich, Uttam Saha
  • Patent number: 11218137
    Abstract: The present disclosure relates to integrated circuits, and more particularly, to a low clock load dynamic dual output latch circuit and methods of operation. The structure includes: a plurality of dynamic clocked stacks which are configured to receive input data and provide a true logical value and a complement logical value; and a plurality of holding stacks which are configured to provide a hold signal to the dynamic clocked stacks and output the true logical value and the complement logical value in response to the hold signal being activated.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: January 4, 2022
    Assignee: GLOBALFOUNDRIES U.S. INC.
    Inventors: Uttam Saha, Mahbub Rashed
  • Publication number: 20210320650
    Abstract: The present disclosure relates to integrated circuits, and more particularly, to a low clock load dynamic dual output latch circuit and methods of operation. The structure includes: a plurality of dynamic clocked stacks which are configured to receive input data and provide a true logical value and a complement logical value; and a plurality of holding stacks which are configured to provide a hold signal to the dynamic clocked stacks and output the true logical value and the complement logical value in response to the hold signal being activated.
    Type: Application
    Filed: April 14, 2020
    Publication date: October 14, 2021
    Inventors: Uttam SAHA, Mahbub RASHED
  • Patent number: 11050414
    Abstract: A dynamic single input-dual output latch includes input, feedback, and output stages. In the input stage, operations are dependent on a clock signal (CLK) and a feedback signal (FB) from the feedback stage. For example, when FB is at a low voltage level and CLK switches to a high voltage level, the input stage enters a data capture mode. Once data has been captured, FB switches back to the high voltage level, placing the input stage in a data hold mode. In the output stage, operations are dependent on CLK but independent of FB. For example, instead of initiating output signal stabilization only after both CLK and FB are at high voltage levels, weak pull-down transistors (including at least one CLK-controlled pull-down transistor) are employed in the output stage to ensure output signal stabilization is initiated after data capture has begun but before FB switches to the high voltage level.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: June 29, 2021
    Assignee: GLOBALFOUNDRIES U.S. Inc.
    Inventors: Uttam Saha, Mahbub Rashed
  • Publication number: 20210107870
    Abstract: Compounds that are inhibitors of retinoic acid inducible P450 (CYP26) enzymes. The compounds have retinoid activity, are resistant to CYP26-mediated catabolism, act as inhibitors of CYP26B1, and are used for treating diseases that are responsive to retinoids.
    Type: Application
    Filed: October 29, 2020
    Publication date: April 15, 2021
    Inventors: Donald Andrew Cameron, Martin Petkovich, Uttam Saha
  • Publication number: 20200369609
    Abstract: Compounds that are inhibitors of retinoic acid inducible P450 (CYP26) enzymes. The compounds have retinoid activity, are resistant to CYP26-mediated catabolism, act as inhibitors of CYP26B1, and are used for treating diseases that are responsive to retinoids.
    Type: Application
    Filed: December 12, 2018
    Publication date: November 26, 2020
    Inventors: Donald Andrew Cameron, Martin Petkovich, Uttam Saha
  • Publication number: 20190060456
    Abstract: This present disclosure is directed to novel prodrugs of activated vitamin D3 compounds. The prodrugs can be designed to have one or more beneficial properties, such as selective inhibition of the enzyme CYP24, low calcemic activity, and anti-proliferative activity. Specifically, these prodrugs are 1-deoxy prohormones of active Vitamin D analogs, e.g. analogs of calcitriol. This disclosure is also directed to pharmaceutical and diagnostic compositions containing the prodrugs of the invention, and to their medical use, particularly as prodrugs in the treatment and/or prevention of diseases.
    Type: Application
    Filed: October 25, 2018
    Publication date: February 28, 2019
    Inventors: Gary H. Posner, Lindsey C. Hess, Alvin S. Kalinda, Rachel D. Slack, Uttam Saha, P. Martin Petkovich
  • Publication number: 20180117156
    Abstract: This present disclosure is directed to novel prodrugs of activated vitamin D3 compounds. The prodrugs can be designed to have one or more beneficial properties, such as selective inhibition of the enzyme CYP24, low calcemic activity, and anti-proliferative activity. Specifically, these prodrugs are 1-deoxy prohormones of active Vitamin D analogs, e.g. analogs of calcitriol. This disclosure is also directed to pharmaceutical and diagnostic compositions containing the prodrugs of the invention, and to their medical use, particularly as prodrugs in the treatment and/or prevention of diseases.
    Type: Application
    Filed: October 2, 2017
    Publication date: May 3, 2018
    Inventors: Gary H. Posner, Lindsey C. Hess, Alvin S. Kalinda, Rachel D. Slack, Uttam Saha, P. Martin Petkovich
  • Patent number: 9775903
    Abstract: This present disclosure is directed to novel prodrugs of activated vitamin D3 compounds. The prodrugs can be designed to have one or more beneficial properties, such as selective inhibition of the enzyme CYP24, low calcemic activity, and anti-proliferative activity. Specifically, these prodrugs are 1-deoxy prohormones of active Vitamin D analogs, e.g. analogs of calcitriol. This disclosure is also directed to pharmaceutical and diagnostic compositions containing the prodrugs of the invention, and to their medical use, particularly as prodrugs in the treatment and/or prevention of diseases.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: October 3, 2017
    Assignees: JOHNS HOPKINS UNIVERSITY, OPKO IRELAND GLOBAL HOLDINGS, LTD.
    Inventors: Gary H. Posner, Lindsey C. Hess, Alvin S. Kalinda, Rachel D. Slack, Uttam Saha, P. Martin Petkovich
  • Patent number: 9198923
    Abstract: This invention relates to methods and small molecules having a phosphate group that can be used to inhibit phosphate transport and to treat or prevent diseases that are related to disorders in the maintenance of normal serum phosphate levels.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: December 1, 2015
    Assignee: OPKO IRELAND GLOBAL HOLDINGS, LTD.
    Inventors: Uttam Saha, Christian F. Helvig, P. Martin Petkovich
  • Patent number: 8906888
    Abstract: The present invention provides novel 16,23-diene 25-oxime ether analogs of 1,25-dihydroxy vitamin D3, compositions comprising these compounds and methods of using these compounds as inhibitors of CYP24. In particular, the novel compound of the invention are useful for treating diseases which benefit from a modulation of the levels of 1,25-dihydroxy vitamin D3, for example, cell-proliferative disorders.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: December 9, 2014
    Assignees: Cytochroma Inc., Johns Hopkins University
    Inventors: Uttam Saha, Gary H. Posner, Mehmet Kahraman
  • Publication number: 20140113886
    Abstract: A stabilized 1,25-dihydroxyvitamin D2 composition which is particularly well suited for pharmaceutical formulations, pharmaceutical formulations of the 1,25-dihydroxyvitamin D2 composition, and a method of making the purified composition by purifying a crude 1,25-dihydroxyvitamin D2 from acetone/water, are disclosed.
    Type: Application
    Filed: January 2, 2014
    Publication date: April 24, 2014
    Applicant: CYTOCHROMA INC.
    Inventor: Uttam Saha
  • Publication number: 20130157987
    Abstract: This present disclosure is directed to novel prodrugs of activated vitamin D3 compounds. The prodrugs can be designed to have one or more beneficial properties, such as selective inhibition of the enzyme CYP24, low calcemic activity, and anti-proliferative activity. Specifically, these prodrugs are 1-deoxy prohormones of active Vitamin D analogs, e.g. analogs of calcitriol. This disclosure is also directed to pharmaceutical and diagnostic compositions containing the prodrugs of the invention, and to their medical use, particularly as prodrugs in the treatment and/or prevention of diseases.
    Type: Application
    Filed: January 13, 2011
    Publication date: June 20, 2013
    Applicants: JOHNS HOPKINS UNIVERSITY, CYTOCHROMA INC.
    Inventors: Gary H. Posner, Lindsey C. Hess, Alvin S. Kalinda, Rachel D. Slack, Uttam Saha, P. Martin Petkovich
  • Publication number: 20120130133
    Abstract: Processes for preparing vitamin D2 derivatives and intermediates to vitamin D2 derivatives are disclosed. An improved photolysis process for the preparation of cis intermediate (I) from the trans starting material (II) are disclosed. Also disclosed is an improved process for the formation of a trans double bond at C22-C23 of the vitamin D2 derivative, which provides high selectivity of the desired trans double bond of compound (III) over the undesired cis double bond of compound (IIIA).
    Type: Application
    Filed: November 25, 2009
    Publication date: May 24, 2012
    Applicant: CYTOCHROMA INC.
    Inventor: Uttam Saha
  • Publication number: 20120028926
    Abstract: This invention relates to methods and small molecules having a phosphate group that can be used to inhibit phosphate transport and to treat or prevent diseases that are related to disorders in the maintenance of normal serum phosphate levels.
    Type: Application
    Filed: January 26, 2010
    Publication date: February 2, 2012
    Applicant: CYTOCHROMA INC.
    Inventors: Uttam Saha, Christian F. Helvig, P. Martin Petkovich
  • Patent number: 8106035
    Abstract: The present invention provides novel D-ring and side-chain analogs of 1?,25-dihydroxyvitamin D3, compositions comprising these compounds and methods of using these compounds as selective inhibitors of CYP24. In particular, the compounds of the invention are useful for treating diseases which benefit from a modulation of the levels of 1?,25-dihydroxyvitamin D3, for example, cell-proliferative disorders.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: January 31, 2012
    Assignee: Cytochroma Inc.
    Inventors: Gary H. Posner, Jae Kyoo Lee, Qiang Wang, Kenneth R. Crawford, Hong Woon Yang, Steven M. Silverman, Byung-Chul Suh, Jay A. White, Glenville Jones, Uttam Saha, Heung Bae Jeon
  • Patent number: 8039676
    Abstract: A process for producing a compound of the formula: including reacting of a compound of the formula: with diphenyl phosphine oxide using a binary phase reaction mixture including diphenyl phosphine oxide in an organic solvent, a basic aqueous solution, and a phase transfer catalyst, to obtain the compound of formula 1, wherein Ph is phenyl, X1 and X2 are both hydrogen or X1 and X2 taken together are CH2, R1 is a protecting group, R2 is fluorine, hydrogen, or OR3, wherein R3 is a protecting group, and the squiggly line represents a bond that results in the adjacent double bond being in either the E or Z configuration, is disclosed.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: October 18, 2011
    Assignee: Cytochroma Inc.
    Inventor: Uttam Saha
  • Patent number: 7973024
    Abstract: The present invention provides novel sulfoximine compounds, compositions comprising these compounds and methods of using these compounds as inhibitors of CYP24. In particular, the compounds of the invention are useful for treating diseases which benefit from a modulation of the levels of 1?,25-dihydroxy vitamin D3, for example, cell-proliferative disorders.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: July 5, 2011
    Assignee: Cyctochroma Inc.
    Inventors: Gary Posner, Mehmet Kahraman, Uttam Saha