1
Jonathan N Chasman, Ramon F Hegel, Philip E Kendall, Nathan B Postma, Douglas S Spencer: Coated abrasive suitable for use as a lapping material. Minnesota Mining and Manufacturing Company, Donald M Sell, David L Weinstein, September 27, 1988: US04773920 (109 worldwide citation)

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 bac ...


2
Ramon F Hegel: Ultra-violet light curable compositions for abrasion resistant articles. Minnesota Mining and Manufacturing Company, Donald M Sell, James A Smith, James V Lilly, March 17, 1987: US04650845 (24 worldwide citation)

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 ...


3
Ramon F Hegel: Ultra-violet light curable compositions for abrasion resistant articles. Minnesota Mining and Manufacturing Company, Donald M Sell, James V Lilly, November 15, 1988: US04785064 (15 worldwide citation)

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 ...


4
Stephen F Wolf, Ramon F Hegel: Environmentally protected optical recording media. Minnesota Mining and Manufacturing Company, Donald M Sell, James A Smith, Douglas B Little, March 24, 1987: US04652498 (9 worldwide citation)

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 whi ...


5
Ramon F Hegel: Radiation curable phosphorate ester compounds. Minnesota Mining and Manufacturing Company, Donald M Sell, James A Smith, Douglas B Little, May 5, 1987: US04663184 (9 worldwide citation)

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 str ...


6
Jathan D Edwards, Frank E Aspen, Ramon F Hegel, Chad R Sandstrom: Thermoplastic substrates for holographic data storage media. Imation, Eric D Levinson, August 26, 2003: US06611365 (5 worldwide citation)

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 ...


7
Jathan D Edwards, Frank E Aspen, Ramon F Hegel, Chad R Sandstrom: Fabrication of sandwiched construction media. Imation, Eric D Levinson, April 25, 2006: US07034971 (3 worldwide citation)

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 ...


8
Ramon F Hegel, Stanley C Busman: Recording material formulations for holographic media. Imation, Eric D Levinson, March 8, 2005: US06864019 (3 worldwide citation)

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 photosensiti ...


9
Ramon F Hegel: Environmentally protected holographic device construction. Imation, Eric D Levinson, December 30, 2003: US06671073 (3 worldwide citation)

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 ...


10
Jathan D Edwards, Frank E Aspen, Ramon F Hegel, Chad R Sandstrom: Sandwich holographic disk construction with thin molded substrates. Imation, Eric D Levinson, February 1, 2005: US06850345 (2 worldwide citation)

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 ...