Patents by Inventor Ramon F. Hegel
Ramon F. Hegel 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: 7455889Abstract: Holographic data storage media having a sandwiched construction are described in which a holographic recording material is sandwiched between two substrates. The holographic media formulation is often formed of two or more components mixed to obtain a homogeneous formulation. The holographic media formulation may include two or more components which are mixed together prior to injection between the substrates. Curing of the holographic media formulation is substantially avoided during mixing, yet accelerated after the formulation is injected between the substrates. Accordingly, the system and techniques can be used to improve the large scale manufacturability of such media by allowing for fabrication of such media within reasonable cycle times, such as less than one minute, while adhering to stringent requirements for optical clarity and parallelism.Type: GrantFiled: March 24, 2004Date of Patent: November 25, 2008Assignee: Imation Corp.Inventors: Jathan D. Edwards, Ramon F. Hegel, Thomas J. Adam
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Patent number: 7247397Abstract: The invention provides a lubricant useful in magnetic recording media and optical recording media comprising a functionalized perfluoropolyether comprising multiple acrylate endgroups. More specifically, the lubricant of the invention is a functionalized perfluoropolyether comprising at least about two acrylate groups. In one embodiment, the lubricant of the invention is a functionalized perfluoropolyether comprising a perfluoropolyether tetraacrylate. A magnetic recording medium is also provided comprising a thin metal magnetic recording layer, said layer having a coating of the functionalized perfluoropolyether lubricant comprising at least about three acrylate end groups.Type: GrantFiled: December 9, 2003Date of Patent: July 24, 2007Assignee: Imation Corp.Inventor: Ramon F. Hegel
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Patent number: 7034971Abstract: In one embodiment, holographic data storage medium includes a first thermoplastic substrate portion having a thickness less than approximately 2 millimeters and a second thermoplastic substrate portion having a thickness less than approximately 2 millimeters. A holographic recording material may be sandwiched between the first and second thermoplastic substrate portions. By making thermoplastic substrate portions sufficiently thin, edge wedge problems can be avoided.Type: GrantFiled: October 11, 2004Date of Patent: April 25, 2006Assignee: Imation Corp.Inventors: Jathan D. Edwards, Frank E. Aspen, Ramon F. Hegel, Chad R. Sandstrom
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Patent number: 6864019Abstract: Holographic data storage media having a sandwiched construction are described in which a holographic recording material is sandwiched between two substrates. A variety of different formulations of the holographic recording material are also described. By improving the formulation of the photosensitive material, holographic media can be improved.Type: GrantFiled: June 27, 2002Date of Patent: March 8, 2005Assignee: Imation Corp.Inventors: Ramon F. Hegel, Stanley C. Busman
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Patent number: 6850345Abstract: In one embodiment, holographic data storage medium includes a first thermoplastic substrate portion having a thickness less than approximately 2 millimeters and a second thermoplastic substrate portion having a thickness less than approximately 2 millimeters. A holographic recording material may be sandwiched between the first and second thermoplastic substrate portions. By making thermoplastic substrate portions sufficiently thin, edge wedge problems can be avoided.Type: GrantFiled: February 18, 2004Date of Patent: February 1, 2005Assignee: Imation Corp.Inventors: Jathan D. Edwards, Frank E. Aspen, Ramon F. Hegel, Chad R. Sandstrom
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Publication number: 20040165235Abstract: In one embodiment, holographic data storage medium includes a first thermoplastic substrate portion having a thickness less than approximately 2 millimeters and a second thermoplastic substrate portion having a thickness less than approximately 2 millimeters. A holographic recording material may be sandwiched between the first and second thermoplastic substrate portions. By making thermoplastic substrate portions sufficiently thin, edge wedge problems can be avoided.Type: ApplicationFiled: February 18, 2004Publication date: August 26, 2004Inventors: Jathan D. Edwards, Frank E. Aspen, Ramon F. Hegel, Chad R. Sandstrom
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Publication number: 20040042055Abstract: In one embodiment, holographic data storage medium includes a first thermoplastic substrate portion having a thickness less than approximately 2 millimeters and a second thermoplastic substrate portion having a thickness less than approximately 2 millimeters. A holographic recording material may be sandwiched between the first and second thermoplastic substrate portions. By making thermoplastic substrate portions sufficiently thin, edge wedge problems can be avoided.Type: ApplicationFiled: May 19, 2003Publication date: March 4, 2004Inventors: Jathan D. Edwards, Frank E. Aspen, Ramon F. Hegel, Chad R. Sandstrom
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Publication number: 20040002008Abstract: Holographic data storage media having a sandwiched construction are described in which a holographic recording material is sandwiched between two substrates. A variety of different formulations of the holographic recording material are also described. By improving the formulation of the photosensitive material, holographic media can be improved.Type: ApplicationFiled: June 27, 2002Publication date: January 1, 2004Applicant: Imation Corp.Inventors: Ramon F. Hegel, Stanley C. Busman
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Patent number: 6671073Abstract: A holographic optical data storage device according to the present invention includes a photopolymer layer having an upper surface and an oppositely disposed lower surface. The device includes a substantially transparent upper substrate layer having a first inside surface lying adjacent to the upper surface of the photopolymer layer. The device includes a substantially transparent lower substrate layer having a second inside surface lying adjacent to the lower surface of the photopolymer layer. The upper and lower substrates have first and second peripheral edges respectively with an opening formed therebetween. The device further includes a connection member engaged to the upper and lower substrates wherein the connection member seals the opening. A method of fabricating a holographic optical data storage device is also provided.Type: GrantFiled: April 10, 2001Date of Patent: December 30, 2003Assignee: Imation Corp.Inventor: Ramon F. Hegel
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Patent number: 6611365Abstract: In one embodiment, holographic data storage medium includes a first thermoplastic substrate portion having a thickness less than approximately 2 millimeters and a second thermoplastic substrate portion having a thickness less than approximately 2 millimeters. A holographic recording material may be sandwiched between the first and second thermoplastic substrate portions. By making thermoplastic substrate portions sufficiently thin, edge wedge problems can be avoided.Type: GrantFiled: March 20, 2001Date of Patent: August 26, 2003Assignee: Imation Corp.Inventors: Jathan D. Edwards, Frank E. Aspen, Ramon F. Hegel, Chad R. Sandstrom
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Publication number: 20020145772Abstract: A holographic optical data storage device according to the present invention includes a photopolymer layer having an upper surface and an oppositely disposed lower surface. The device includes a substantially transparent upper substrate layer having a first inside surface lying adjacent to the upper surface of the photopolymer layer. The device includes a substantially transparent lower substrate layer having a second inside surface lying adjacent to the lower surface of the photopolymer layer. The upper and lower substrates have first and second peripheral edges respectively with an opening formed therebetween. The device further includes a connection member engaged to the upper and lower substrates wherein the connection member seals the opening. A method of fabricating a holographic optical data storage device is also provided.Type: ApplicationFiled: April 10, 2001Publication date: October 10, 2002Inventor: Ramon F. Hegel
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Publication number: 20020135829Abstract: In one embodiment, holographic data storage medium includes a first thermoplastic substrate portion having a thickness less than approximately 2 millimeters and a second thermoplastic substrate portion having a thickness less than approximately 2 millimeters. A holographic recording material may be sandwiched between the first and second thermoplastic substrate portions. By making thermoplastic substrate portions sufficiently thin, edge wedge problems can be avoided.Type: ApplicationFiled: March 20, 2001Publication date: September 26, 2002Applicant: Imation Corp.Inventors: Jathan D. Edwards, Frank E. Aspen, Ramon F. Hegel, Chad R. Sandstrom
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Patent number: 5089924Abstract: The present invention concerns a magnetic tape cassette housing comprising a polymeric cassette box having an interior surface. The interior surface of the cassette box has been irradiated with an amount of ultraviolet radiation sufficient to impart a priming effect to the interior surface of the cassette box. A wear pad is adhered to the interior surface of the cassette box. The wear pad comprises a low-friction, wear-resistant polyolefin sheet. The wear pad also comprises a polyamide adhesive layer coated on one side of the polyolefin sheet and adhering the polyolefin sheet to the interior surface of the cassette box. In another aspect, the present invention concerns a method of applying a polyolefin sheet to an interior surface of a polymeric cassette box.Type: GrantFiled: December 18, 1989Date of Patent: February 18, 1992Assignee: Minnesota Mining and Manufacturing CompanyInventors: Vincent P. Teuber, Ramon F. Hegel
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Patent number: 4785064Abstract: Inherently highly abrasion-resistant cast articles are prepared by polymerizing a composition comprising (I) as a first component from 0 to 100 parts of urethane polyacrylic ester and (II) as a second component, correspondingly from 100 to 0 parts of a composition containing (A) 30 to 60% by weight of a polyacrylic ester having 4 to 10 acryloyloxy groups, (B) 20 to 70% by weight of a polymerization shrinkage modifier, and (C) 0 to 30% of a diluent monomer. A source of free-radicals may be added to the composition.Type: GrantFiled: November 3, 1986Date of Patent: November 15, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramon F. Hegel
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Patent number: 4773920Abstract: Coated abrasive comprising a backing and abrasive grain adhered to said backing by means of a binder. The binder is prepared from a composition that is curable by free-radical polymerization. The composition contains abrasive grain suspended therein at the time the composition is coated onto the backing. The abrasive exhibits high endurance for extended periods of use. The coated abrasive is prepared by a method comprising the steps of:(a) providing a coatable composition comprising a binder curable by free-radical polymerization, said composition having lapping size abrasive grains suspended therein,(b) coating said composition on a backing, and(c) curing said composition by means of free-radical polymerization.Type: GrantFiled: March 18, 1987Date of Patent: September 27, 1988Assignee: Minnesota Mining and Manufacturing CompanyInventors: Jonathan N. Chasman, Ramon F. Hegel, Philip E. Kendall, Nathan B. Postma, Douglas S. Spencer
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Patent number: 4663184Abstract: Radiation curable phosphorate ester compounds of the following formula: ##STR1## wherein, Rd is selected from the group consisting of ##STR2## wherein n=1-3, and those bond sites on Y not occupied by Rd are occupied by a moiety selected from the group consisting of --H and --ReOH wherein Re is a straight chain or branched alkyl having 1 to 20 carbon atoms;Ra is selected from --H and --CH.sub.3 ;--Y-- is a hydrocarbon moiety selected from the group consisting of straight chain, cyclic ad branched aliphatic, aromatic, and alicyclic moieties of 1-30 carbon atoms; andR is an alkylene moiety having 2 to 5 carbon atoms;R.sub.f is selected from the group consisting of hydrogen or methyl;A is selected from the group consisting of ##STR3## in which n1 is an integer from 1 to 6; and R.sub.g is selected from the group consisting of alkylene moieties having 2 to 10 carbon atoms, 5- or 6-membered carbocyclic aliphatic radicals having 5 to 10 carbon atoms, and arylene radicals having 6 to 10 carbon atoms; andm=1-10.Type: GrantFiled: October 22, 1985Date of Patent: May 5, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramon F. Hegel
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Patent number: 4652498Abstract: An optical recording medium comprising a transparent substrate having an information-bearing surface, a specularly reflective layer on the information-bearing surface, and a protective layer covering the other side of the reflective layer has been improved by using a new type of protective layer which comprises a polymeric network containing phosphoric acid moieties. Examples of the compounds which are cured into the protective layer in order to obtain better adhesion to aluminum protective layers are: 2-methacryloyloxyethyl phosphate, and the phosphonate ester triacrylate having the formula ##STR1## wherein m may be 1-5. These phosphorous-containing organic compounds are radiation curable, and they are mixed with other radiation curable polymers to form the protective layer which is preferably radiation cured. Phosphorous atoms account for between about 0.05 and 0.5 weight-percent of the polymeric network within the protective layer.Type: GrantFiled: October 22, 1985Date of Patent: March 24, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventors: Stephen F. Wolf, Ramon F. Hegel
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Patent number: 4650845Abstract: Inherently highly abrasion-resistant cast articles are prepared by polymerizing a composition comprising (I) as a first component from 0 to 100 parts of urethane polyacrylic ester and (II) as a second component, correspondingly from 100 to 0 parts of a composition containing (A) 30 to 60% by weight of a polyacrylic ester having 4 to 10 acryloyloxy groups, (B) 20 to 70% by weight of a polymerization shrinkage modifier, and (C) 0 to 30% of a diluent monomer. A source of free-radicals may be added to the composition.Type: GrantFiled: July 10, 1984Date of Patent: March 17, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Ramon F. Hegel