Polychromic substances and their use
US8083973B2 · kind B2 · utility
4Cited by
2References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2009 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Jan 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/025
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound which undergoes a color change upon irradiation, and which has the general structure: X—C≡C—C≡C—Y—(CO)n-QZ wherein X is H, alkyl or —Y—(CO)n-QW; each Y is the same or a different divalent alkylene group; Q is O, S or NR; R is H or alkyl; W is H, alkyl or Z; each Z is the same or a different unsaturated alkyl group; and each n is 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.