CA2152545C - Compositions a changement de couleur comportant un acide - Google Patents

Compositions a changement de couleur comportant un acide Download PDF

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Publication number
CA2152545C
CA2152545C CA002152545A CA2152545A CA2152545C CA 2152545 C CA2152545 C CA 2152545C CA 002152545 A CA002152545 A CA 002152545A CA 2152545 A CA2152545 A CA 2152545A CA 2152545 C CA2152545 C CA 2152545C
Authority
CA
Canada
Prior art keywords
coloring composition
undercolor
overcolor
acid
weight
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 - Fee Related
Application number
CA002152545A
Other languages
English (en)
Other versions
CA2152545A1 (fr
Inventor
Richard E. Miller
Charlene R. Couch
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.)
Crayola LLC
Original Assignee
Binney and Smith Inc
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
Priority claimed from US08/270,454 external-priority patent/US5489331A/en
Application filed by Binney and Smith Inc filed Critical Binney and Smith Inc
Publication of CA2152545A1 publication Critical patent/CA2152545A1/fr
Application granted granted Critical
Publication of CA2152545C publication Critical patent/CA2152545C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Landscapes

  • Inks, Pencil-Leads, Or Crayons (AREA)
CA002152545A 1994-07-05 1995-06-23 Compositions a changement de couleur comportant un acide Expired - Fee Related CA2152545C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/270,454 1994-07-05
US08/270,454 US5489331A (en) 1992-07-31 1994-07-05 Color changing compositions using acids

Publications (2)

Publication Number Publication Date
CA2152545A1 CA2152545A1 (fr) 1996-01-06
CA2152545C true CA2152545C (fr) 2000-02-01

Family

ID=23031386

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002152545A Expired - Fee Related CA2152545C (fr) 1994-07-05 1995-06-23 Compositions a changement de couleur comportant un acide

Country Status (1)

Country Link
CA (1) CA2152545C (fr)

Also Published As

Publication number Publication date
CA2152545A1 (fr) 1996-01-06

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