Patent number: 9249136
Abstract: A naphthopyran compound represented by the formula (I): wherein: n1, n2, p, q is an integer comprised from 0 to 5 inclusive; m is an integer comprised from 0 to 4 inclusive; R1 and R2 represent a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —NRbRc, —CO—Ra, and —CO2Ra1, wherein Ra, Ra1, Rb and Rc, are as defined in the description; R3 represents a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1; R4 represents a group selected from halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, —NRaRa1, —CO—Ra, and —CO2Ra1; R5 represents a group selected from: halogen, —Ra, —OH, —ORa, —SH, —SRa, —NH2, and —NRaRa1, wherein Ra and Ra1 are as defined hereinbefore, or when q is equal to 2, then two R5 together represent further a group —O—(CH2)q1—O— wherein q1 represents an integer comprised from 1 to 3 inclusive.
Type:
Grant
Filed:
September 6, 2006
Date of Patent:
February 2, 2016
Assignees:
Essilor International (Compagnie Generale d'Optique), Alphamicron, Incorporated
Inventors:
Stuart Aiken, Jean-Paul Cano, Christopher David Gabbutt, Bernard Mark Heron, Tamas Kosa, Linli Su, Ludmila Sukhomlinova, Bahman Taheri
Patent number: 9227851
Abstract: Provided is a Bi-substituted rare earth iron garnet single crystal which has a composition of R3-xBixFe5-wAwO12, wherein R denotes one or more rare earth elements among Y, Eu, Gd, Ho, Yb, Lu, Nd, Tm, La, Sm, Dy, Er, Ce, and Pr while definitely including Gd, A denotes one or more elements among Ga, Al, In, Sc, Co, Ni, Cr, V, Ti, Si, Ge, Mg, Zn, Nb, Ta, Sn, Zr, Hf, Pt, Rh, Te, Os, Ce, and Lu, 0.7<x?1.5, and 0<w?1.5, does not contain Pb and contains Pt, and additionally contains M which denotes Mn or at least one Group 2 element, wherein a coefficient ? is set to any value within a numerical range of 0.815±0.035 and ? (which means (?×[M])?[Pt]) is set from ?0.40 atppm to 3.18 atppm.
Type:
Grant
Filed:
May 30, 2011
Date of Patent:
January 5, 2016
Assignee:
NAMIKI SEIMITSU HOUSEKI KABUSHIKI KAISHA
Inventors:
Kenichi Shiroki, Takashi Fukuhara, Kenji Narita
Patent number: 9201167
Abstract: A Bi-substituted rare earth iron garnet single crystal has a composition of R3-xBixFe5-wAwO12 (wherein R denotes one or more rare earth elements among Tb, Y, Eu, Gd, Ho, Yb, Lu, Nd, Tm, La, Sm, Dy, Er, Ce, and Pr and inevitably include Tb; A denotes one or more elements among Ga, Al, In, Sc, Co, Ni, Cr, V, Ti, Si, Ge, Mg, Zn, Nb, Ta, Sn, Zr, Hf, Pt, Rh, Te, Os, Ce, and Lu, 0.7<x?1.5, and 0<w?1.5), contains Pt and does not contain Pb, and additionally contains Mn or at least one Group 2 element, wherein the coefficient ? is set at a value within a numerical range of 0.91±0.05 and ? (which means [M]?(?×[Pt])) is set from ?7.23 atppm to 1.64 atppm.
Type:
Grant
Filed:
December 23, 2011
Date of Patent:
December 1, 2015
Assignee:
NAMIKI SEIMITSU HOUSEKI KABUSHIKI KAISHA
Inventors:
Kenichi Shiroki, Takashi Fukuhara, Kenji Narita