Patent US4473693A successfully refreshed from Google Patents.
US4473693A
Expired / Lapsed
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Aminonaphthalimide dyes for intracellular labelling
Assignee: Individual
•
Filing: 1978-08-04
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Granted: 1984-09-25
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Expires: 1998-08-04
Abstract
Abstract Fluorescent yellow dyes of the aminonaphthalimide type which have the following structures: LYCH <IMAGE> LYVS <IMAGE> In the formula above alk (alkali metal) may be substituted for Li+ and thus alk may be Li+, Na+, or K+, but the preferable structure is Li+. These dyes have shown superior activity in intracellular use in vivo in tissues such as turtle retina and wholemount tissue observation.
Inventors
- 👤 Walter W. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:49
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/14; C09; C09B; C09B57/00; C09B57/08; C09B69/00; C09B69/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
A compound represented by the following formula: ##STR6## where alk=alkali metal cation selected from Li + , Na + , K + ; X=NH 2 --NH--C(═O)--NH--, ##STR7##
Claim 2
Dependent Claim
27 words
A compound represented by the following formula: ##STR6## where alk=alkali metal cation selected from Li + , Na + , K + ; X=NH 2 --NH--C(═O)--NH--, ##STR7##
Claim 3
Dependent Claim
9 words
The compound of claim 1 wherein X=NH 2 --NH--C(═O)--NH--.
Claim 4
Dependent Claim
8 words
The compound of claim 1 wherein X= ##STR8##
Claim 5
Dependent Claim
12 words
The compound of claims 1, 2, or 3 wherein alk=Li + .
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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) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |