Patents by Inventor Kailash C. Srivastava

Kailash C. Srivastava 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).

  • Adsorbent
    Patent number: 6143692
    Abstract: An adsorbent that can be used to remove environmental contaminants such as organics, cations and anions in a single process step is prepared from humic acid. The adsorbent can be a soluble humic acid in liquid form (e.g., in aqueous solution) or the humic acid can be insolubilized and/or immobilized on a solid support. The adsorbent can also be used to recover agriculturally desirable metals in chelated form from contaminated water. The liquid form of the adsorbent can be used to wash solids to remove contaminants.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: November 7, 2000
    Assignee: Arctech, Inc.
    Inventors: Hyderabed G. Sanjay, Kailash C. Srivastava, Daman S. Walia
  • Microbial process for the mitigation of sulfur compounds from natural gas
    Patent number: 5981266
    Abstract: An anaerobic process of desulfurizing a sour natural gas stream wherein a selected consortium of chemoautotrophic bacteria converts H.sub.2 S and other sulfur species into elemental sulfur, which is recovered as a product. The process is conducted at pressures of up to 1000 psi and temperatures up to 140.degree. F. (10.degree. C. to 60.degree. C.), and mitigates up to 10,000 ppm H.sub.2 S to pipeline standards of .ltoreq.4 ppm and up to 10% CO.sub.2 to .ltoreq.2% CO.sub.2.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: November 9, 1999
    Assignee: Gas Research Institute
    Inventors: Kailash C. Srivastava, Daman S. Walia
  • Adsorbent
    Patent number: 5906960
    Abstract: An adsorbent that can be used to remove environmental contaminants such as organics, cations and anions in a single process step is prepared from humic acid. The adsorbent can be a soluble humic acid in liquid form (e.g., in aqueous solution) or the humic acid can be insolubilized and/or immobilized on a solid support. The adsorbent can also be used to recover agriculturally desirable metals in chelated form from contaminated water. The liquid form of the adsorbent can be used to wash solids to remove contaminants.
    Type: Grant
    Filed: August 15, 1996
    Date of Patent: May 25, 1999
    Assignee: Arctech, Inc.
    Inventors: Hyderabad G. Sanjay, Kailash C. Srivastava, Daman S. Walia
  • Bacillus sp. A30-1 ATCC no. 53841
    Patent number: 5166069
    Abstract: A thermostable lipase is produced by aerobically culturing a microorganism having the identifying characteristics of Bacillus sp.A30-1 ATCC No. 53841 on a nutrient medium under growth conditions until a recoverable lipolytic activity is detectable and thereafter isolating the thermostable lipase. The thermostable lipase has an optimum temperature of about 60.degree. C. and an optimum pH of about 9.5.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: November 24, 1992
    Assignee: Michigan Biotechnology Institute
    Inventors: Gwo-Jenn Shen, Kailash C. Srivastava, Yongxiang Wang, Henry Y. Wang
  • Essentially purified, thermostable and alkalophilic lipase from Bacillus Sp. A30-1 ATCC 53841
    Patent number: 5093256
    Abstract: A thermostable lipase is produced by aerobically culturing a microorganism having the identifying characteristics of Bacillus sp. A30-1 ATCC No. 53841 on a nutrient medium under growth conditions until a recoverable lipolytic activity is detectable and thereafter isolating the thermostable lipase. The thermostable lipase has an optimum pH of 9.5, an isoelectric point of 5.15, a molecular weight of about 65,000 and retaining approximately 100% of its original activity upon being heated at 75.degree. C. for 30 minutes.
    Type: Grant
    Filed: February 22, 1989
    Date of Patent: March 3, 1992
    Inventors: Gwo-Jenn Shen, Kailash C. Srivastava, Yongxiang Wang, Henry Y. Wang