Patents by Inventor Michael D. Vrbanac

Michael D. Vrbanac 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).

  • Process for producing very low COD unbleached pulp
    Patent number: 7226525
    Abstract: A pulp product that has a low COD is comprised of an unbleached pulp that is soaked and washed in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 3.0 kg/1000 kg of dry pulp. The pulp is produced by repetitively soaking and washing an unbleached pulp in alkaline water that is never allowed to drop below pH 7.0. The pulp is soaked and washed for a total of at least 400 minutes at an elevated temperature to produce the pulp product that has a low COD.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: June 5, 2007
    Assignee: Weyehaeuser Company
    Inventors: Michael D. Vrbanac, Brian Wester, Brian E. Dennis, Peter K. Lau, Julie A. Reimer, David W. Bickell
  • Process for making a very low COD unbleached pulp
    Patent number: 7081184
    Abstract: A process for making a pulp product that has a low COD is comprised of soaking and washing pulp in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 2.0 kg/1000 kg of dry pulp. The process includes repetitively soaking and washing an unbleached pulp in alkaline water that is never allowed to drop below pH 7.0. In this process, the pulp is soaked and washed for a total of at least 220 minutes at an elevated temperature to produce the pulp product that has a low COD.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: July 25, 2006
    Assignee: Weyerhaeuser Company
    Inventors: Brian Wester, Michael D. Vrbanac, Julie A. Reimer, Peter K. Lau, Brian E. Dennis, David W. Bickell
  • Granular polysaccharide having enhanced surface charge
    Publication number: 20040031579
    Abstract: A modified polysaccharide having enhanced surface charge. The polysaccharide is modified to include a cationic polymer, preferably a polyquaternary amine, and has a surface charge from about +5 to about +20 mV. The modified polysaccharide can be advantageous incorporated into a papermaking furnish with enhanced retention.
    Type: Application
    Filed: April 23, 2003
    Publication date: February 19, 2004
    Applicant: Weyerhaeuser Company
    Inventors: Michael D. Vrbanac, Sherry L. Thomson
  • Process for making a very low COD unbleached pulp
    Publication number: 20030213568
    Abstract: A process for making a pulp product that has a low COD is comprised of soaking and washing pulp in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 2.0 kg/1000 kg of dry pulp. The process includes repetitively soaking and washing an unbleached pulp in alkaline water that is never allowed to drop below pH 7.0. In this process, the pulp is soaked and washed for a total of at least 220 minutes at an elevated temperature to produce the pulp product that has a low COD.
    Type: Application
    Filed: December 26, 2002
    Publication date: November 20, 2003
    Inventors: Brian Wester, Michael D. Vrbanac, Julie A. Reimer, Peter K. Lau, Brian E. Dennis, David W. Bickell
  • Very low COD unbleached pulp
    Publication number: 20030213572
    Abstract: A pulp product that has a low COD is comprised of an unbleached pulp that is soaked and washed in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 3.0 kg/1000 kg of dry pulp. The pulp is produced by repetitively soaking and washing an unbleached pulp in alkaline water that is never allowed to drop below pH 7.0. The pulp is soaked and washed for a total of at least 400 minutes at an elevated temperature to produce the pulp product that has a low COD.
    Type: Application
    Filed: July 30, 2002
    Publication date: November 20, 2003
    Inventors: Michael D. Vrbanac, Brian Wester, Brian E. Dennis, Peter K. Lau, Julie A. Reimer, David W. Bickell
  • Process for producing very low COD unbleached pulp
    Publication number: 20030213570
    Abstract: A pulp product that has a low COD is comprised of an unbleached pulp that is soaked and washed in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 3.0 kg/1000 kg of dry pulp. The pulp is produced by repetitively soaking and washing an unbleached pulp in alkaline water that is never allowed to drop below pH 7.0. The pulp is soaked and washed for a total of at least 400 minutes at an elevated temperature to produce the pulp product that has a low COD.
    Type: Application
    Filed: July 30, 2002
    Publication date: November 20, 2003
    Inventors: Michael D. Vrbanac, Brian Wester, Brian E. Dennis, Peter K. Lau, Julie A. Reimer, David W. Bickell
  • Very low COD unbleached pulp
    Publication number: 20030213569
    Abstract: A pulp product that has a low COD is comprised of an unbleached pulp that is soaked and washed in alkaline water for a sufficient time so that the COD after soaking and washing is less than or equal to 2.0 kg/1000 kg of dry pulp. The pulp is produced by repetitively soaking and washing an unbleached pulp in alkaline water that is never allowed to drop below pH 7.0. The pulp is soaked and washed for a total of at least 220 minutes at an elevated temperature to produce the pulp product that has a low COD.
    Type: Application
    Filed: December 26, 2002
    Publication date: November 20, 2003
    Inventors: Brian Wester, Michael D. Vrbanac, Julie A. Reimer, Peter K. Lau, Brian E. Dennis, David W. Bickell
  • Granular polysaccharide having enhanced surface charge
    Publication number: 20020139501
    Abstract: A modified polysaccharide having enhanced surface charge. The polysaccharide is modified to include a cationic polymer, preferably a polyquaternary amine, and has a surface charge from about +5 to about +20 mV. The modified polysaccharide can be advantageous incorporated into a papermaking furnish with enhanced retention.
    Type: Application
    Filed: January 17, 2002
    Publication date: October 3, 2002
    Applicant: Weyerhaeuser Company
    Inventors: Michael D. Vrbanac, Sherry L. Thomson