Patents by Inventor Ramsis Gobran
Ramsis Gobran 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).
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Patent number: 6191055Abstract: A diaper construction is provided with an external porous reinforcement strip at the front part of the outside of the diaper, which strip provides reinforcement against an adhesive fastening tab and provides an oil contamination tolerant adhesion surface.Type: GrantFiled: October 28, 1998Date of Patent: February 20, 2001Assignee: 3M Innovative Properties CompanyInventors: Charles E. Boyer, III, Robert J. Kinney, Ramsis Gobran, Ruben E. Velasquez Urey, Roland R. Midgley
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Patent number: 5885269Abstract: A diaper construction is provided with an external porous reinforcement strip at the front part of the outside of the diaper, which strip provides reinforcement against an adhesive fastening tab and provides an oil-contamination tolerant adhesion surface.Type: GrantFiled: December 18, 1996Date of Patent: March 23, 1999Assignee: Minnesota Mining and Manufacturing Co.Inventors: Charles E. Boyer, III, Robert J. Kinney, Ramsis Gobran, Ruben E. Velasquez Urey, Roland R. Midgley
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Patent number: 5629063Abstract: A pressure-sensitive adhesive closure system for a disposable diaper, or the like, in which a pressure-sensitive adhesive fastening tab releasably attaches to a non-blocking thin diaper backsheet which has been treated to raise the surface energy and pattern printed, preferably in a polar solvent, in a discrete area with a release material. The release material prevents the backsheet from blocking in roll form and allows the pressure-sensitive adhesive fastening tab to be removed from the backsheet without destruction of the backsheet.Type: GrantFiled: May 24, 1995Date of Patent: May 13, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 5571586Abstract: A pressure-sensitive adhesive closure system for a disposable diaper, or the like, in which a pressure-sensitive adhesive fastening tab releasably attaches to a non-blocking thin diaper backsheet which has been treated to raise the surface energy and pattern printed, preferably in a polar solvent, in a discrete area with a release material. The release material prevents the backsheet from blocking in roll form and allows the pressure-sensitive adhesive fastening tab to be removed from the backsheet without destruction of the backsheet.Type: GrantFiled: November 2, 1994Date of Patent: November 5, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 5547766Abstract: A non-yellowing pressure-sensitive adhesive tape with a polyolefin film layer and a fibrous web layer. A propylene film layer has an an antioxidant package of:(i) 0.004 to 0.04 weight percent of Irganox.TM. 1010;(ii) 0.03 to 0.2 weight percent of a solid phosphite antioxidant;(iii) 0.05 to 0.4 weight percent of a thioester; and(iv) 0.05 to 0.4 weight percent of an inorganic acid scavenger;The tackified synthetic rubber pressure-sensitive adhesive layer comprises 100 parts of a polystyrene-polydiene block copolymer, and 20 to 300 parts of a compatible tackifying agent and an antioxidant package, based on 100 parts of the polystyrene-polydiene block copolymer, comprising:(i) 0.1 to 0.6 parts Irganox.TM. 1010;(ii) 0.1 to 0.6 parts Irganox.TM. 565;(iii) 0.0 to 0.6 parts of a phosphite antioxidant.Type: GrantFiled: July 28, 1995Date of Patent: August 20, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 5453319Abstract: A hot melt coatable pressure-sensitive adhesive is provided showing high levels of adhesion to low surface energy films and nonwovens. The adhesive elastomeric phase comprises from 78 to 98 parts by weight of a diblock A-B type block copolymer with an elastomeric block of 1,3-polybutadiene with 2 to 22 parts by weight of multiblock A-B type block copolymer. The tackifying material comprises 140 parts or less of a solid tackifying resin and a liquid tackifier to provide an adhesive having a composite midblock glass transition temperature of less than -10.degree. C.Type: GrantFiled: May 26, 1994Date of Patent: September 26, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 5360855Abstract: A novel 2-substituted butadiene block copolymer is provided which provides adhesives having superior adhesion and tolerance to oil contaminated surfaces. The elastomeric block has a glass transition temperature of less than about minus 65.degree. C. with the 2 substituent being an alkyl group.Type: GrantFiled: June 22, 1993Date of Patent: November 1, 1994Assignee: Minnesota Mining & Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 5342685Abstract: A hot melt coatable pressure-sensitive adhesive is provided showing high levels of adhesion to low surface energy films and nonwovens. The adhesive elastomeric phase comprises from 78 to 98 parts by weight of a diblock A-B type block copolymer with an elastomeric block of 1,3-polybutadiene with 2 to 22 parts by weight of multiblock A-B type block copolymer. The tackifying material comprises 140 parts or less of a solid tackifying resin and a liquid tackifier to provide an adhesive having a composite midblock glass transition temperature of less than -10.degree. C.Type: GrantFiled: May 18, 1992Date of Patent: August 30, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 4652491Abstract: Pressure-sensitive adhesive capable of functioning as an adhesive for diaper closure tape, comprising a blend of specified portions of styrene:butadiene AB block copolymer, random SBR and/or milled natural rubber, and rosin ester tackifier of the type capable of tackifying butadiene-based rubbers.Type: GrantFiled: May 2, 1985Date of Patent: March 24, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 4260659Abstract: A pressure-sensitive adhesive tape which not only conforms well and adheres quickly to irregular substrates but also possesses excellent shear adhesion performance. These properties, normally mutually exclusive, are achieved through use of superposed plural pressure-sensitive adhesive strata, the outer stratum being significantly softer than the one lying immediately beneath it.Type: GrantFiled: June 18, 1979Date of Patent: April 7, 1981Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 4237889Abstract: Pressure-sensitive adhesive tape, having an untensilized crystalline isotactic polypropylene or linear high density polyethylene film backing with a pattern of alternating ridges and valleys on one side, is especially adapted for use as a tab closure for diapers. The ridges are so disposed that, when a tab is cut from the tape, at least some of the ridges extend at an angle of 60.degree. or less to the lateral edge of the tab, thereby minimizing any tendency toward inadvertent tearing.Type: GrantFiled: September 13, 1978Date of Patent: December 9, 1980Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 4039724Abstract: Non-conjugated dienes are reacted with phenolic compounds in the presence of a Friedel-Crafts catalyst to produce poly(phenol/diene) copolymer resin having repeating alternate phenol and diene units, a number average molecular weight of 600 - 5000 and a glass transition temperature of 100.degree.- 220.degree. C. The resin, and its partially or fully hydrogenated counterpart, can be blended with various rubbery polymers to provide adhesive compositions having improved adhesive tack.Type: GrantFiled: August 15, 1975Date of Patent: August 2, 1977Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 4032486Abstract: Adhesive compositions having a high degree of adhesive tack are provided by certain rubbery materials which are blended with a phenol-diene-olefin resinous reaction product.Type: GrantFiled: October 23, 1973Date of Patent: June 28, 1977Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 3976606Abstract: Adhesive compositions having a high degree of adhesive tack are provided by certain rubbery materials which contain terpene-phenolic resins. The terpene phenolic resins are prepared by alkylating phenols with terpene hydrocarbons.Type: GrantFiled: October 23, 1973Date of Patent: August 24, 1976Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: 3944523Abstract: Non-conjugated dienes are reacted with phenolic compounds in the presence of a Friedel-Crafts catalyst to produce poly(phenol/diene) copolymer resin having repeating alternate phenol and diene units, a number average molecular weight of 600-5000 and a glass transition temperature of 100.degree.-220.degree.C. The resin, and its partially or fully hydrogenated counterpart, can be blended with various rubbery polymers to provide adhesive compositions having improved adhesive tack.Type: GrantFiled: October 23, 1973Date of Patent: March 16, 1976Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran
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Patent number: H1402Abstract: A linear styrene-isoprene-styrene block copolymer composition comprised of linear polymeric blocks wherein the block copolymer composition has a coupling efficiency of 25 to 82 percent, a polystyrene content of from 19 to 27 percent by weight, a polystyrene block molecular weight (peak polystyrene equivalent molecular weight as determined by gel permeation chromatography) of 12,000 to 18,000, and an overall molecular weight (peak polystyrene equivalent molecular weight as determined by gel permeation chromatography) of from 170,000 to 280,000. The invention also contemplates adhesive formulations comprising these block copolymer compositions and a tackifying resin.Type: GrantFiled: September 24, 1992Date of Patent: January 3, 1995Assignee: Shell Oil CompanyInventors: Steven S. Chin, John A. Miller, Ramsis Gobran
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Patent number: D368775Type: GrantFiled: March 2, 1994Date of Patent: April 9, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramsis Gobran