Phenoxyalkylcarboxylic acid derivatives and process for their preparations
USRE38921E1 · kind E1 · reissue
0Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2003 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Jul 21, 2023 |
Classification
- Technology area (CPC —)General
Abstract
Phenoxyalkylcarboxylic acid derivative represented by the following formula, wherein R1 indicates hydrogen atom, methyl group or ethyl group, m is an integer from 2 to 5, and n is an integer from 3 to 8, X1 and X2 each independently represent sulfur atom, oxygen atom, sulfinyl group or sulfonyl group, proviso X1 and X2 are not simultaneously oxygen atom; their alkali salts and hydrates thereof are useful as antiallergic agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.