US3976647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(lower alkyl sulfonyl-methyl sulfonyl)-piperazines
Assignee: Polaroid Corp
•
Filing: 1975-04-01
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Granted: 1976-08-24
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Expires: 1995-04-01
Abstract
Abstract This application is directed to compounds of the formula ##EQU1## wherein R 1 is lower alkyl; R 2 is hydrogen, lower alkyl or ##EQU2## wherein m is a whole number 2 to 5, n is a whole number 1 to 4 and Y is hydrogen, --OH or --COOR wherein R is hydrogen or lower alkyl; and X is ##EQU3## wherein R 3 is hydrogen or ##EQU4## wherein n and Y have the same meaning given above, R 4 is ##EQU5## wherein n and Y have the same meaning given above and R 5 is lower alkyl. These compounds are useful as silver halide solvents in photography.
Inventors
- 👤 Richard B. Greenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:01
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
85 words
A compound of the formula: ##EQU6## wherein R 1 is lower alkyl; R 2 is hydrogen or lower alkyl; ##EQU7## wherein A is a halide of a sulfonate; wherein R 3 is hydrogen or --(CH 2 ) n --Y wherein n is a whole number 1 to 4; Y is hydrogen, --OH or --COOR wherein R is hydrogen or lower alkyl; R 4 is --(CH 2 ) n --Y wherein n and Y have the same meaning given above and R 5 is lower alkyl.
Claim 2
Dependent Claim
85 words
A compound of the formula: ##EQU6## wherein R 1 is lower alkyl; R 2 is hydrogen or lower alkyl; ##EQU7## wherein A is a halide of a sulfonate; wherein R 3 is hydrogen or --(CH 2 ) n --Y wherein n is a whole number 1 to 4; Y is hydrogen, --OH or --COOR wherein R is hydrogen or lower alkyl; R 4 is --(CH 2 ) n --Y wherein n and Y have the same meaning given above and R 5 is lower alkyl.
Claim 3
Dependent Claim
12 words
A compound as defined in claim 1 wherein R 2 is hydrogen.
Claim 4
Dependent Claim
11 words
A compound as defined in claim 1 wherein X is ##STR19##
Claim 5
Dependent Claim
19 words
A compound as defined in claim 1 wherein X is ##STR20## wherein A is a halide or a sulfonate.
Claim 6
Dependent Claim
12 words
A compound as defined in claim 3 wherein R 3 is ##STR21##
Claim 7
Dependent Claim
16 words
A compound as defined in claim 4 wherein said Y of said R 4 is hydrogen.
Claim 8
Dependent Claim
6 words
The compound having the formula ##STR22##
Claim 9
Dependent Claim
6 words
The compound having the formula ##STR22##
Claim 10
Dependent Claim
6 words
The compound having the formula ##STR23##
Claim 11
Dependent Claim
6 words
The compound having the formula ##STR23##
Claim 12
Dependent Claim
6 words
The compound having the formula ##STR24##
Claim 13
Dependent Claim
6 words
The compound having the formula ##STR24##
Claim 14
Dependent Claim
6 words
The compound having the formula ##STR25##
Claim 15
Dependent Claim
6 words
The compound having the formula ##STR25##
Claim 16
Dependent Claim
12 words
A compound as defined in claim 3 wherein R 2 is hydrogen.
References Cited (Backward Citations)
US3203952A
Cited
US3895010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |