Patents by Inventor Rolf Berndt

Rolf Berndt 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: 8940174
    Abstract: A method for treating spent abrasive slurry obtained from cutting a body of a substrate material into wafer-like slices, the slurry comprising a lubricant fluid, unspent abrasive particles and fines, is disclosed, method comprising separating the spent slurry in a first sedimentation step into a solids concentrate comprising unspent abrasive particles and a solids depleted slurry; and subsequently separating the solids depleted slurry by cross-flow filtration into a fines containing fraction and a solids and fines depleted regenerated lubricant fluid.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: January 27, 2015
    Assignee: Pall Corporation
    Inventors: Rolf Berndt, Jochen Ruth
  • Patent number: 8056551
    Abstract: The present invention relates to a method and a system for manufacturing wafer-like slices from a body of a substrate material, especially for use in the manufacture of semiconductor devices. The method comprises providing a slicing device with a cutting wire equipped on its surface with abrasive particles; providing an aqueous cooling and lubricating fluid, said fluid having an ionic strength corresponding to an electrical conductivity of about 30 IJS/cm or less; cutting said body with said cutting wire into slices while dispensing said cooling and lubricating fluid into a kerf area where said cutting wire contacts and cuts said body, said cooling and lubricating fluid promoting removal of powdered substrate material from said kerf area resulting in spent fluid; and removing said spent fluid from said cutting device and recovering said powdered substrate material from said spent fluid.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: November 15, 2011
    Assignee: Pall Corporation
    Inventors: Lothar Dalitz, Rolf Berndt
  • Publication number: 20100170161
    Abstract: The present invention relates to a method and a system for treating spent abrasive slurry obtained from a process for cutting a body of a substrate material into wafer-like slices, said slurry comprising a lubricant fluid, unspent abrasive particles and fines. The method comprises separating the spent slurry in a first sedimentation step into a solids concentrate comprising unspent abrasive particles and a solids depleted slurry; and subsequently separating the solids depleted slurry by cross-flow filtration into a fines containing fraction and a solids and fines depleted regenerated lubricant fluid.
    Type: Application
    Filed: October 30, 2007
    Publication date: July 8, 2010
    Applicant: PALL CORPORATION
    Inventors: Rolf Berndt, Jochen Ruth
  • Publication number: 20100170495
    Abstract: The present invention relates to a method and a system for manufacturing wafer-like slices from a body of a substrate material, especially for use in the manufacture of semiconductor devices. The method comprises providing a slicing device with a cutting wire equipped on its surface with abrasive particles; providing an aqueous cooling and lubricating fluid, said fluid having an ionic strength corresponding to an electrical conductivity of about 30 ?S/cm or less; cutting said body with said cutting wire into slices while dispensing said cooling and lubricating fluid into a kerf area where said cutting wire contacts and cuts said body, said cooling and lubricating fluid promoting removal of powdered substrate material from said kerf area resulting in spent fluid; and removing said spent fluid from said cutting device and recovering said powdered substrate material from said spent fluid.
    Type: Application
    Filed: October 30, 2007
    Publication date: July 8, 2010
    Applicant: PALL CORPORATION
    Inventors: Lothar Dalitz, Rolf Berndt
  • Patent number: 6916425
    Abstract: Specification discloses the use of a dynamic cross-flow filtration system for the filtration of mash. Also disclosed are a mashing process, wherein mash is filtered and wort is obtained, and a process for the preparation of beer, as well as apparatuses and devices for performing one or more of these process.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: July 12, 2005
    Assignee: Pall Corporation
    Inventors: Markus Lotz, Horst Randhahn, Rolf Berndt, Gebhardt Muller
  • Publication number: 20020050477
    Abstract: Specification discloses the use of a dynamic cross-flow filtration system for the filtration of mash. Also disclosed are a mashing process, wherein mash is filtered and wort is obtained, and a process for the preparation of beer, as well as apparatuses and devices for performing one or more of these process.
    Type: Application
    Filed: April 19, 2001
    Publication date: May 2, 2002
    Inventors: Markus Lotz, Horst Randhahn, Rolf Berndt, Gebhardt Muller