| Patent Number |
Title Of Patent |
Date Issued |
| 5968708 |
Optical recording medium and method of producing the same |
October 19, 1999 |
| An optical recording medium has a substrate, and a light absorbing layer serving as a recording layer formed on the substrate. The light absorbing layer contains a metallo-phthalocyanine compound of formula (I): ##STR1## wherein M is Mn, Fe, Co, Zn or Cd; and either A.sup.1 or A.sup. |
| 5316814 |
Optical information recording medium |
May 31, 1994 |
| An optical information recording medium including a ROM area and a recordable area is composed of a light-transmitting substrate with prepits and/or guide grooves formed on the surface thereof, a light absorption layer serving as a recording layer which is composed of a dye as the main |
| 5252372 |
Optical information recording medium |
October 12, 1993 |
| An optical information recording medium is composed of a substrate and a recording layer which is formed on the substrate and made of a composition comprising at least gold and sulfur, with the gold content being 50 atomic percent or more in the composition. |
| 5242730 |
Optical recording medium |
September 7, 1993 |
| An optical recording medium is composed of a substrate, and a recording layer formed thereon, which is made of (a) a first recording layer which contains a light-absorbing organic compound and can be deformed upon irradiation of light thereto, and (b) a second recording layer which i |
| 5238722 |
Optical recording medium |
August 24, 1993 |
| An optical recording medium is composed of a substrate, a recording layer containing an inorganic material which includes as the main component a sulfide of at least one element selected from the group consisting of the elements of IIb, IIIb, IVb, Vb, and VIb groups, which is formed on t |
| 5213947 |
Optical recording medium |
May 25, 1993 |
| An optical recording medium comprising a pair of concentrically-positioned disk-shaped polycarbonate substrates with a recording layer on a single surface of at least one of these substrates, wherein the substratcs are formed into a sealed configuration with the recording layer on the in |
| 5169745 |
Optical information recording medium |
December 8, 1992 |
| An optical information recording medium comprising a substrate and a recording layer, formed on the substrate, which comprises a composition of antimony, sulfur, and one element selected from the group consisting of the elements belonging to group IIB and group IVA of the periodic table. |
| 5137947 |
Composition for water proof sheets |
August 11, 1992 |
| A composition for producing a water-proof sheet comprising 100 weight parts of a linear ethylene-alpha-olefin copolymer having a density equal to or less than 0.910 g/ml, and 10-200 weight parts of asphalt. Water proof sheets produced from the composition are also included in the inventi |
| 5132960 |
Information recording medium with concentric spacers and cut-away adhesive |
July 21, 1992 |
| An information recording medium of an air-sandwich sealed type is disclosed, which comprises a pair of disk-shaped substrate to form an inner space therebetween; an inner circumferential spacer and an outer circumferential spacer interposed between the pair of disk-shaped substrates; |
| 5068270 |
Composition for water proof sheets |
November 26, 1991 |
| A composition for producing a water-proof sheet comprising 100 weight parts of a linear ethylene-alpha-olefin copolymer having a density equal to or less than 0.910 g/ml, and 10-200 weight parts of asphalt. Water proof sheets produced from the composition are also included in the inventi |
| 4915997 |
Optical information recording medium |
April 10, 1990 |
| An optical information recording medium is disclosed which comprises a pair of substrates at least one of which has a recording layer on one side thereof and which are placed opposingly to each other so that said recording layer is positioned on the inside and are bonded to each other |
| 4891305 |
Optical information recording element |
January 2, 1990 |
| This invention relate to an optical information recording medium, characterized by having an organic thin film recording layer containing at least one of compounds expressed by the general formula (I), (II), (III) and (IV): ##STR1## (wherein in the above formulas, A, B, D and E r |
| 4865949 |
Optical information recording medium |
September 12, 1989 |
| An optical information recording medium is disclosed, which comprises a pair of disc-shaped substrates, at least one of the substrates having a recording layer comprising an organic dye compound on one side thereof, which are disposed so as to face each other, with the recording layer |
| 4861637 |
Optical information recording medium |
August 29, 1989 |
| An optical information recording medium comprises a pair of substrates, with a recording layer comprising an organic dye being formed on one side of at least one substrate, fixed to each other through or without through a spacer and by an adhesive agent, in such a manner that the recordi |
| 4767693 |
Optical information recording medium |
August 30, 1988 |
| This invention provides an optical information recording medium that has, on a substrate, a recording layer containing a cyanine dye represented by the general formula: ##STR1## (wherein, R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each stands for a substituted |
| 4758499 |
Optical information recording medium |
July 19, 1988 |
| This invention relates to an optical information recording medium, characterized by having an organic thin film recording layer containing at least one of triaryl methane type coloring matters expressed by the general formula (1), (2) or (3): ##STR1## (wherein, in the above formu |
| 4714667 |
Optical information recording medium |
December 22, 1987 |
| The present invention relates to an optical information recording medium comprising a recording layer applied directly on a substrate or applied on a substrate by intervening an underlayer therebetween, and further comprising a protective layer on said recording layer if necessary, c |
| 4711798 |
Optical information recording medium |
December 8, 1987 |
| An optical information recording medium comprising a pair of substrates, with a recording layer comprising an organic dye being formed on one side of at least one substrate, fixed to each other through or without through a spacer and by an adhesive agent, in such a manner that the record |
| 4696892 |
Optical information recording medium |
September 29, 1987 |
| This invention relates to an optical information recording medium, characterized in that on a substrate there is applied a coloring matter film chemically inert to said substrate, said coloring matter film having an extinction coefficient of at least 1. |
| 4656121 |
Optical information recording medium |
April 7, 1987 |
| This invention relates to an optical information recording medium having an organic thin film recording layer, and optionally having an underlayer and/or protective layer, characterized in that at least one of said recording layer, underlayer and protective layer contains a compound |
