Method, system and withdrawal screen section for impregnating chips

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8647469
APP PUB NO 20130240167A1
SERIAL NO

13817556

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The method, system and a withdrawal screen section are for the impregnation of chips during the manufacture of chemical pulp. Chips are both steamed and impregnated in a low pressure impregnation vessel, using pressurized hot spent cooking liquor BL as the main part of the impregnation liquid. The hot spent cooking liquor produces most of the steam BLST necessary for steaming the chips. At least two independent first and second screen rows, SC1 and SC1b respectively, are installed in order to improve the process in the impregnation vessel. The first screen row withdraws acidified treatment liquor for disposal which otherwise would be a parasitic acidified waste fluid in the system. The second screen row recirculates treatment fluid back to center of treatment vessel in order to even out the pH profile over the cross section of the vessel.

First Claim

See full text

Other Claims data not available

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
VALMET AKTIEBOLAGGUSTAF GIDLOEFS VAEG 4 SUNDSVALL S-851 94

International Classification(s)

loading....
  • 2010 Application Filing Year
  • D21C Class
  • 111 Applications Filed
  • 78 Patents Issued To-Date
  • 70.28 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2010201120122013201420152016201720180255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Furhem, Hans Skoghall, SE 1 7
Trolin, Daniel Camacari, BR 13 24

Cited Art Landscape

Load Citation

Patent Citation Ranking

  • 2 Citation Count
  • D21C Class
  • 26.98 % this patent is cited more than
  • 11 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges34835401 - 1011 - 2021 - 30051015202530354045505560657075808590

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Aug 11, 2025