Search Patents
  • Publication number: 20110287324
    Abstract: A composition including glass fibers with a surface atomic concentration of oxygen in sp3 bonds with silicon of at least about 34% wherein the fibers are formed into a battery separator.
    Type: Application
    Filed: August 5, 2010
    Publication date: November 24, 2011
    Applicant: Hollingsworth & Vose Company
    Inventors: Mohan Rajaram, George C. Zguris
  • Publication number: 20120121975
    Abstract: Compositions including glass fibers with a high surface atomic percentage of oxygen bonded to silicon wherein the fibers form at least part of a battery separator or other battery component.
    Type: Application
    Filed: November 23, 2011
    Publication date: May 17, 2012
    Applicant: HOLLINGSWORTH & VOSE COMPANY
    Inventors: Mohan Rajaram, George C. Zguris
  • Publication number: 20120070729
    Abstract: The application describes glass compositions that includes more than 30 percent by weight of bismuth compounds, in particular bismuth oxide. Additionally, components, specifically battery separators, made from the glass compositions with high levels of bismuth are described.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 22, 2012
    Applicant: HOLLINGSWORTH & VOSE COMPANY
    Inventors: John Wertz, Christopher Campion, Yuri Vulfson, Rene Gargan, Nicolas Clement
  • Patent number: 9293748
    Abstract: Disclosed is a battery separator, comprising two fiber regions comprising glass fibers, and a middle fiber region disposed between them comprising larger average diameter fibers and specified amounts of silica, or fine fibers, or both; and processes for making the separator. Also disclosed is a battery separator, comprising a fiber region and either one or two silica-containing region(s) adjacent thereto, each of the regions containing a specified amount of silica; and processes for making the separator. Such separators are useful, e.g., in lead-acid batteries.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: March 22, 2016
    Assignee: Hollingsworth & Vose Company
    Inventors: Akshay Ashirgade, Zhiping Jiang
  • Patent number: 9577236
    Abstract: Disclosed is a battery separator, comprising two fiber regions comprising glass fibers, and a middle fiber region disposed between them comprising larger average diameter fibers and specified amounts of silica, or fine fibers, or both; and processes for making the separator. Also disclosed is a battery separator, comprising a fiber region and either one or two silica-containing region(s) adjacent thereto, each of the regions containing a specified amount of silica; and processes for making the separator. Such separators are useful, e.g., in lead-acid batteries.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: February 21, 2017
    Assignee: Hollingsworth & Vose Company
    Inventors: Akshay Ashirgade, Zhiping Jiang
  • Publication number: 20120028126
    Abstract: Disclosed are glass compositions, glass fiber compositions, glass fiber battery separators, glass fiber filter media, battery additives and active materials formed with glass compositions disclosed, glass fiber radiation shields, and glass fiber paper compositions. Certain embodiments include, among other components, bismuth oxide. Certain embodiments include about 0.5-30% bismuth oxide of the composition by weight and silica oxide at about 54-70% of the composition by weight. Embodiments may also include other components. For example, zinc oxide can make up about 0.01-3% of the composition by weight.
    Type: Application
    Filed: August 2, 2011
    Publication date: February 2, 2012
    Applicant: HOLLINGSWORTH & VOSE COMPANY
    Inventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
  • Publication number: 20120021295
    Abstract: Disclosed are glass compositions, glass fiber compositions, glass fiber battery separators, glass fiber filter media, battery additives and active materials formed with glass compositions disclosed, glass fiber radiation shields, and glass fiber paper compositions. Certain embodiments include, among other components, bismuth oxide. Certain embodiments include about 0.5-30% bismuth oxide of the composition by weight and silica oxide at about 54-70% of the composition by weight. Embodiments may also include other components. For example, zinc oxide can make up about 0.01-3% of the composition by weight.
    Type: Application
    Filed: August 2, 2011
    Publication date: January 26, 2012
    Applicant: Hollingsworth & Vose Company
    Inventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
  • Patent number: 6955865
    Abstract: A non-woven sheet of polyolefin fibers having opposed major surfaces is disclosed. Some areas of one or both of the major surfaces are hydrophilic as a consequence of an acrylic graft polymerized with the surfaces of the fibers in those areas while the fibers in other areas of that major surface are free of the graft and, as a consequence, remain hydrophobic. A battery separator composed of at least two such non-woven sheets is also disclosed, as well as batteries having a separator composed of at least one such non-woven sheet. Also disclosed is a non-woven sheet of polyolefin fibers where opposed major surfaces of the sheet are hydrophilic as a consequence of such an acrylic acid graft, but the ion exchange coefficients of the two major surfaces are different.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: October 18, 2005
    Assignee: Hollingsworth & Vose Company
    Inventor: Wai Ming Choi
  • Patent number: 8012629
    Abstract: Disclosed are glass compositions, glass fiber compositions, glass fiber battery separators, glass fiber filter media, battery additives and active materials formed with glass compositions disclosed, glass fiber radiation shields, and glass fiber paper compositions. Certain embodiments include, among other components, bismuth oxide. Certain embodiments include about 0.5-30% bismuth oxide of the composition by weight and silica oxide at about 54-70% of the composition by weight. Embodiments may also include other components. For example, zinc oxide can make up about 0.01-3% of the composition by weight.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: September 6, 2011
    Assignee: Hollingsworth & Vose Company
    Inventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
  • Patent number: 8211575
    Abstract: Disclosed are glass compositions, glass fiber compositions, glass fiber battery separators, glass fiber filter media, battery additives and active materials formed with glass compositions disclosed, glass fiber radiation shields, and glass fiber paper compositions. Certain embodiments include, among other components, bismuth oxide. Certain embodiments include about 0.5-30% bismuth oxide of the composition by weight and silica oxide at about 54-70% of the composition by weight. Embodiments may also include other components. For example, zinc oxide can make up about 0.01-3% of the composition by weight.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: July 3, 2012
    Assignee: Hollingsworth & Vose Company
    Inventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
  • Publication number: 20020142226
    Abstract: A glass fiber Separator material is disclosed. The separator is composed of a mass of intermeshed glass fibers substantially all of which have a fiber diameter not greater than about 20 &mgr;m, and at least 5 percent w/w of which have a fiber diameter less than 1 &mgr;m, and, distributed through the glass fibers, and from 0.2 percent w/w to 20 percent w/w of cellulose fibrils. The fibrils are from a slurry having a Canadian freeness sufficiently low that the separator material has a tensile strength greater than an otherwise identical separator where glass fibers having an average diameter greater than 1 &mgr;m replace the cellulose fibrils.
    Type: Application
    Filed: October 9, 2001
    Publication date: October 3, 2002
    Applicant: Hollingsworth & Vose Company
    Inventors: George C. Zguris, Frank C. Harmon
  • Patent number: 5468572
    Abstract: A substantially binder-free glass fiber separator, especially for valve regulated ("sealed") lead acid batteries is disclosed. The separator has a reduced thickness and temporarily inhibited resiliency. A substantially binder-free glass fiber web having a given thickness is wetted with a controlled amount of liquid and compressed to a substantially reduced thickness and the liquid suppresses the natural resiliency of the glass fiber separator so that it will have a substantially reduced thickness when the compression is released. The amount of liquid required to suppress the resiliency of the glass fiber separator is substantially less than the minimum amount of the portion of electrolyte which would be carried in the separator in a finished cell.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: November 21, 1995
    Assignee: Hollingsworth & Vose Company
    Inventors: George C. Zguris, Frank C. Harmon, Jr.
  • Patent number: 5336275
    Abstract: A substantially binder-free glass fiber separator, especially for valve regulated ("sealed") lead acid batteries is disclosed. The separator has a reduced thickness and temporarily inhibited resiliency. A substantially binder-free glass fiber web having a given thickness is wetted with a controlled amount of liquid and compressed to a substantially reduced thickness and the liquid suppresses the natural resiliency of the glass fiber separator so that it will have a substantially reduced thickness when the compression is released. The amount of liquid required to suppress the resiliency of the glass fiber separator is substantially less than the minimum amount of the portion of electrolyte which would be carried in the separator in a finished cell.
    Type: Grant
    Filed: May 11, 1992
    Date of Patent: August 9, 1994
    Assignee: Hollingsworth & Vose Company
    Inventors: George C. Zguris, Frank C. Harmon, Jr.