Patent US4656286A successfully refreshed from Google Patents.
US4656286A
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Aminoethanethiol and thiazolidine compounds
Assignee: Polaroid Corp
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Filing: 1986-05-23
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Granted: 1987-04-07
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Expires: 2006-05-23
Abstract
Abstract There are disclosed certain aminoethanethiols, and salts thereof, and certain thiazolidines which are made therefrom. The compounds are useful as intermediates in the synthesis of photographic image dye-providing materials.
Inventors
- 👤 Paul T. MacGregor
- 👤 Myron S. Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:58
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/04; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30541; G03C7/30547; G03C8/00; G03C8/02; G03C8/08; G03C8/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
A compound represented by the formula ##STR13## wherein R is --COOR 7 , --CONHR 7 , --OH, --SO 3 H or --SO 3 R 8 ; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently is hydrogen or alkyl having from 1 to 6 carbon atoms; R 7 is hydrogen or alkyl having from 1 to 6 carbon atoms; R 8 is an alkali metal; and n is 2 or 3; and the salts thereof.
Claim 2
Dependent Claim
85 words
A compound represented by the formula ##STR13## wherein R is --COOR 7 , --CONHR 7 , --OH, --SO 3 H or --SO 3 R 8 ; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently is hydrogen or alkyl having from 1 to 6 carbon atoms; R 7 is hydrogen or alkyl having from 1 to 6 carbon atoms; R 8 is an alkali metal; and n is 2 or 3; and the salts thereof.
Claim 3
Dependent Claim
28 words
The compound as defined in claim 1 wherein R is --COOR 7 , R 3 and R 4 are methyl and n is 2; and the salts thereof.
Claim 4
Dependent Claim
101 words
A compound represented by the formula ##STR14## wherein A is hydrogen, alkyl having from 1 to 6 carbon atoms, phenyl, naphthyl, benzyl or phenethyl; R is --COOR 7 , --CONHR 7 , --OH, --SO 3 H, or --SO 3 R 8 ; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently is hydrogen or alkyl having from 1 to 6 carbon atoms; R 7 is hydrogen or alkyl having from 1 to 6 carbon atoms; R 8 is an alkali metal; and n is 2 or 3; and the salts thereof.
Claim 5
Dependent Claim
101 words
A compound represented by the formula ##STR14## wherein A is hydrogen, alkyl having from 1 to 6 carbon atoms, phenyl, naphthyl, benzyl or phenethyl; R is --COOR 7 , --CONHR 7 , --OH, --SO 3 H, or --SO 3 R 8 ; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently is hydrogen or alkyl having from 1 to 6 carbon atoms; R 7 is hydrogen or alkyl having from 1 to 6 carbon atoms; R 8 is an alkali metal; and n is 2 or 3; and the salts thereof.
Claim 6
Dependent Claim
15 words
The compound as defined in claim 3 wherein R 3 and R 4 are methyl.
References Cited (Backward Citations)
No citation records indexed.
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| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |