CA755682A - Compositions of photochromic spirobenzopyrans and polyester resins - Google Patents

Compositions of photochromic spirobenzopyrans and polyester resins

Info

Publication number
CA755682A
CA755682A CA755682A CA755682DA CA755682A CA 755682 A CA755682 A CA 755682A CA 755682 A CA755682 A CA 755682A CA 755682D A CA755682D A CA 755682DA CA 755682 A CA755682 A CA 755682A
Authority
CA
Canada
Prior art keywords
spirobenzopyrans
photochromic
compositions
polyester resins
resins
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.)
Expired
Application number
CA755682A
Inventor
J. Cerreta John
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.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid Co
Publication date
Application granted granted Critical
Publication of CA755682A publication Critical patent/CA755682A/en
Expired legal-status Critical Current

Links

CA755682A Compositions of photochromic spirobenzopyrans and polyester resins Expired CA755682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA755682T

Publications (1)

Publication Number Publication Date
CA755682A true CA755682A (en) 1967-03-28

Family

ID=36190020

Family Applications (1)

Application Number Title Priority Date Filing Date
CA755682A Expired CA755682A (en) Compositions of photochromic spirobenzopyrans and polyester resins

Country Status (1)

Country Link
CA (1) CA755682A (en)

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