Search Patents
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Publication number: 20110287324Abstract: 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: ApplicationFiled: August 5, 2010Publication date: November 24, 2011Applicant: Hollingsworth & Vose CompanyInventors: Mohan Rajaram, George C. Zguris
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Publication number: 20120121975Abstract: 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: ApplicationFiled: November 23, 2011Publication date: May 17, 2012Applicant: HOLLINGSWORTH & VOSE COMPANYInventors: Mohan Rajaram, George C. Zguris
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Publication number: 20120070729Abstract: 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: ApplicationFiled: September 21, 2011Publication date: March 22, 2012Applicant: HOLLINGSWORTH & VOSE COMPANYInventors: John Wertz, Christopher Campion, Yuri Vulfson, Rene Gargan, Nicolas Clement
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Patent number: 9293748Abstract: 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: GrantFiled: September 15, 2014Date of Patent: March 22, 2016Assignee: Hollingsworth & Vose CompanyInventors: Akshay Ashirgade, Zhiping Jiang
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Patent number: 9577236Abstract: 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: GrantFiled: February 9, 2016Date of Patent: February 21, 2017Assignee: Hollingsworth & Vose CompanyInventors: Akshay Ashirgade, Zhiping Jiang
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Publication number: 20120028126Abstract: 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: ApplicationFiled: August 2, 2011Publication date: February 2, 2012Applicant: HOLLINGSWORTH & VOSE COMPANYInventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
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Publication number: 20120021295Abstract: 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: ApplicationFiled: August 2, 2011Publication date: January 26, 2012Applicant: Hollingsworth & Vose CompanyInventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
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Patent number: 6955865Abstract: 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: GrantFiled: May 6, 2002Date of Patent: October 18, 2005Assignee: Hollingsworth & Vose CompanyInventor: Wai Ming Choi
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Patent number: 8012629Abstract: 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: GrantFiled: October 26, 2006Date of Patent: September 6, 2011Assignee: Hollingsworth & Vose CompanyInventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
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Patent number: 8211575Abstract: 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: GrantFiled: August 2, 2011Date of Patent: July 3, 2012Assignee: Hollingsworth & Vose CompanyInventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
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Publication number: 20020142226Abstract: 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: ApplicationFiled: October 9, 2001Publication date: October 3, 2002Applicant: Hollingsworth & Vose CompanyInventors: George C. Zguris, Frank C. Harmon
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Patent number: 5468572Abstract: 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: GrantFiled: August 8, 1994Date of Patent: November 21, 1995Assignee: Hollingsworth & Vose CompanyInventors: George C. Zguris, Frank C. Harmon, Jr.
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Patent number: 5336275Abstract: 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: GrantFiled: May 11, 1992Date of Patent: August 9, 1994Assignee: Hollingsworth & Vose CompanyInventors: George C. Zguris, Frank C. Harmon, Jr.