GB9726361D0 - Photochromic dyes - Google Patents

Photochromic dyes

Info

Publication number
GB9726361D0
GB9726361D0 GBGB9726361.0A GB9726361A GB9726361D0 GB 9726361 D0 GB9726361 D0 GB 9726361D0 GB 9726361 A GB9726361 A GB 9726361A GB 9726361 D0 GB9726361 D0 GB 9726361D0
Authority
GB
United Kingdom
Prior art keywords
photochromic dyes
photochromic
dyes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
GBGB9726361.0A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
James Robinson Speciality Ingredients Ltd
Original Assignee
James Robinson Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by James Robinson Ltd filed Critical James Robinson Ltd
Priority to GBGB9726361.0A priority Critical patent/GB9726361D0/en
Publication of GB9726361D0 publication Critical patent/GB9726361D0/en
Priority to PCT/GB1998/003681 priority patent/WO1999031081A1/en
Ceased legal-status Critical Current

Links

GBGB9726361.0A 1997-12-12 1997-12-12 Photochromic dyes Ceased GB9726361D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GBGB9726361.0A GB9726361D0 (en) 1997-12-12 1997-12-12 Photochromic dyes
PCT/GB1998/003681 WO1999031081A1 (en) 1997-12-12 1998-12-10 Ph sensitive photochromic dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9726361.0A GB9726361D0 (en) 1997-12-12 1997-12-12 Photochromic dyes

Publications (1)

Publication Number Publication Date
GB9726361D0 true GB9726361D0 (en) 1998-02-11

Family

ID=10823563

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB9726361.0A Ceased GB9726361D0 (en) 1997-12-12 1997-12-12 Photochromic dyes

Country Status (2)

Country Link
GB (1) GB9726361D0 (en)
WO (1) WO1999031081A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9706939D0 (en) * 1997-04-04 1997-05-21 James Robinson Ltd Red colouring hyperchromic 3H-naptho[2,1-6]pyrans
GB9821121D0 (en) 1998-09-29 1998-11-25 James Robinson Ltd Grey colouring photochromic fused pyrans
AU770437B2 (en) * 1999-06-03 2004-02-19 Tokuyama Corporation Chromene compounds
IL131264A0 (en) 1999-08-05 2001-01-28 Yeda Res & Dev Photochromic naphthopyran compounds
GB9918951D0 (en) * 1999-08-11 1999-10-13 James Robinson Ltd Rapid fading photo-responsive materials
US6348604B1 (en) * 1999-09-17 2002-02-19 Ppg Industries Ohio, Inc. Photochromic naphthopyrans
US8211338B2 (en) * 2003-07-01 2012-07-03 Transitions Optical, Inc Photochromic compounds
JP4879030B2 (en) * 2007-01-10 2012-02-15 株式会社トクヤマ Method for producing naphthopyran compound
CN102993155B (en) * 2011-09-19 2015-06-03 天津孚信科技有限公司 Preparation method of polysubstituted-diarylnaphthopyran photochromic compounds
JP2015137259A (en) * 2014-01-23 2015-07-30 二朗 阿部 Benzochromene compound, photochromic agent and photochromic optical material

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3627690A (en) * 1969-10-01 1971-12-14 Itek Corp Photochromic naphthopyran compositions
GB2209751A (en) * 1987-09-14 1989-05-24 Plessey Co Plc Water-soluble photochromic compounds
GB9306587D0 (en) * 1993-03-30 1993-05-26 Pilkington Plc Photochromic compounds
US5466398A (en) * 1993-06-21 1995-11-14 Transitions Optical, Inc. Photochromic substituted naphthopyran compounds
US5552090A (en) * 1993-06-21 1996-09-03 Ppg Industries, Inc. Photochromic naphthopyran compounds
US5650098A (en) * 1993-12-09 1997-07-22 Transitions Optical, Inc. Substituted naphthopyrans
US5693830A (en) * 1994-04-08 1997-12-02 Tokuyama Corporation Process for preparing the spiropyrone compounds
US5658501A (en) * 1995-06-14 1997-08-19 Transitions Optical, Inc. Substituted naphthopyrans
AU1866597A (en) * 1995-10-28 1997-05-15 Optische Werke G. Rodenstock Photochrome diaryl-3H-naphthopyrane
US5744070A (en) * 1995-12-20 1998-04-28 Transitions Optical, Inc. Photochromic substituted naphthopyran compounds
GB9706202D0 (en) * 1997-03-25 1997-05-14 James Robinson Ltd Neutral colouring photochromic 2H-naphthol[1,2-b]pyrans and heterocyclic pyrans
GB9706939D0 (en) * 1997-04-04 1997-05-21 James Robinson Ltd Red colouring hyperchromic 3H-naptho[2,1-6]pyrans
JP3982770B2 (en) * 1997-04-30 2007-09-26 株式会社トクヤマ Chromene compounds

Also Published As

Publication number Publication date
WO1999031081A1 (en) 1999-06-24

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)