Patent US4508900A successfully refreshed from Google Patents.
US4508900A
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Cationic compounds of the naphthalimide series, process for their preparation and their use
Assignee: Hoechst AG
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Filing: 1982-09-13
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Granted: 1985-04-02
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Expires: 2002-09-13
Abstract
Abstract Cationic compounds of the formula (1) ##STR1## in which R denotes alkyl, hydroxyalkyl, alkoxyalkyl, phenylalkyl, or phenoxyalkyl, R' denotes alkyl, hydroxyalkyl, benzyl, or allyl and X.sup.(-) denotes a colorless anion, process for their manufacture and their use.
Inventors
- 👤 Norbert Schonberger
- 👤 Erich Schinzel
- 👤 Thomas Martini
- 👤 Gunter Rosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:13
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A cationic compound of the formula: ##STR6## wherein X.sup.(-) denotes a colorless anion.
Claim 2
Dependent Claim
13 words
A cationic compound of the formula: ##STR6## wherein X.sup.(-) denotes a colorless anion.
References Cited (Backward Citations)
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US3880859A
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US3996362A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |