Substituted phenanthropyrans

Details Substituted phenanthropyrans Substituted phenanthropyrans

2007-06-12

2007-06-12

Gulakowski, Randy (Department: 1712)

Compositions

Light transmission modifying compositions

Displaying color change

C252S582000, C359S238000, C549S384000

Reexamination Certificate

active

11377357

ABSTRACT:
The present invention relates to specific photochromic phenanthropyrans as well as to their use in synthetic resin materials of all types, especially for ophthalmic purposes. In particular, the present invention relates to photochromic compounds derived from 2H-phenanthro[2,1-b]pyrans and 3H-phenanthro[3,4-b]pyrans, which in the open form have especially long wavelength absorption maxima, but in the unexcited state are still colorless.

REFERENCES:
patent: 3567605 (1971-03-01), Becker
patent: 4272190 (1981-06-01), Shapiro
patent: 4800270 (1989-01-01), Blais
patent: 4826977 (1989-05-01), Heller et al.
patent: 5106998 (1992-04-01), Tanaka et al.
patent: 5187364 (1993-02-01), Blais
patent: 5238981 (1993-08-01), Knowles
patent: 5303080 (1994-04-01), O'Brien et al.
patent: 5514817 (1996-05-01), Knowles
patent: 5565147 (1996-10-01), Knowles et al.
patent: 5637709 (1997-06-01), Melzig
patent: 5674432 (1997-10-01), Knowles et al.
patent: 5748315 (1998-05-01), Kawai et al.
patent: 5796222 (1998-08-01), Grodevant
patent: 5869658 (1999-02-01), Lin et al.
patent: 5888432 (1999-03-01), Chan
patent: 5990305 (1999-11-01), Zinner et al.
patent: 6022495 (2000-02-01), Kumar
patent: 6037583 (2000-03-01), Moehler et al.
patent: 6154270 (2000-11-01), Ozawa
patent: 6210608 (2001-04-01), Chan et al.
patent: 6294112 (2001-09-01), Clarke et al.
patent: 6437358 (2002-08-01), Potucek et al.
patent: 6496213 (2002-12-01), Ueno
patent: 0 945 451 (1999-09-01), None
patent: 1 038 870 (2000-09-01), None
patent: WO 96/04576 (1996-02-01), None
patent: WO 98/45281 (1998-10-01), None
patent: WO 99/15518 (1999-04-01), None
patent: WO 99/31082 (1999-06-01), None
patent: WO 00/15628 (2000-03-01), None
patent: WO 01/12619 (2001-02-01), None
patent: WO 03/055872 (2003-07-01), None
patent: WO 03/080595 (2003-10-01), None
International Search Report dated Jan. 21, 2005, including English Translation (Four (4) pages). PCT/EP2004/009369.

Affiliated with

Also associated with

Rating

Substituted phenanthropyrans does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Substituted phenanthropyrans, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Substituted phenanthropyrans will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3841893