Patent US3974178A successfully refreshed from Google Patents.
US3974178A
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Naphthostyril cationic dyes
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1973-03-21
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Granted: 1976-08-10
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Expires: 1993-03-21
Abstract
Abstract A compound of the formula (I):
Inventors
- 👤 Masaaki Ohkawa
- 👤 Seizo Konishi
- 👤 Kazuyoshi Hirabayashi
- 👤 Sadaharu Abeta
- 👤 Tetsuo Okaniwa
- 👤 Yoshiro Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:40
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/06; C07; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A compound of the formula ##SPC11## wherein R 1 is β-C 1 -C 2 alkoxy substituted ethyl, R 2 is C 1 -C 4 alkyl or phenyl substituted by one C 1 -C 2 alkoxy, R 3 is C 1 -C 4 alkyl or C 1 -C 2 alkyl substituted by one C 1 -C 4 alkoxy, X is hydrogen or halogen, Y is hydrogen, a C 1 -C 2 alkyl or a halogen, n is an integer of from 1 to 2, and Z - is an anion.
Claim 2
Dependent Claim
89 words
A compound of the formula ##SPC11## wherein R 1 is β-C 1 -C 2 alkoxy substituted ethyl, R 2 is C 1 -C 4 alkyl or phenyl substituted by one C 1 -C 2 alkoxy, R 3 is C 1 -C 4 alkyl or C 1 -C 2 alkyl substituted by one C 1 -C 4 alkoxy, X is hydrogen or halogen, Y is hydrogen, a C 1 -C 2 alkyl or a halogen, n is an integer of from 1 to 2, and Z - is an anion.
Claim 3
Dependent Claim
15 words
The compound according to claim 1, wherein R 2 is C 1 -C 4 alkyl.
Claim 4
Dependent Claim
15 words
The compound according to claim 1, wherein R 3 is C 1 -C 4 alkyl.
Claim 5
Dependent Claim
7 words
The compound represented by the formula: ##SPC12##
Claim 6
Dependent Claim
7 words
The compound represented by the formula: ##SPC12##
Claim 7
Dependent Claim
7 words
The compound represented by the formula: ##SPC13##
Claim 8
Dependent Claim
7 words
The compound represented by the formula: ##SPC13##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |