US3975371A
Expired / Lapsed
US
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Aromatic azo sulfonylnitrene compounds
Assignee: Pharmacia and Upjohn Co
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Filing: 1975-03-17
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Granted: 1976-08-17
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Expires: 1995-03-17
Abstract
Abstract Compounds of the structure ##SPC1## Wherein R and R 1 are the same or different and are selected from the group consisting of hydrogen, halogen, and alkyl from one to four carbon atoms, inclusive, and R 2 is a substance which inhibits thrombogenic or clotting activity of a material and is that portion of a substituted aromatic which couples with a diazonium salt.
Inventors
- 👤 Daniel Lednicer
- 👤 Edward E. Nishizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:21
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/655; C; C08; C08F; C08F8/00; C08F8/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
A compound of the formula ##SPC5## wherein R and R 1 are the same or different and are selected from the group consisting of hydrogen, halogen, and alkyl from one to four carbon atoms, inclusive, and R 2 is a substance which inhibits thrombogenic or clotting activity of a material and is that portion of a substituted aromatic which couples with a diazonium salt.
Claim 2
Dependent Claim
64 words
A compound of the formula ##SPC5## wherein R and R 1 are the same or different and are selected from the group consisting of hydrogen, halogen, and alkyl from one to four carbon atoms, inclusive, and R 2 is a substance which inhibits thrombogenic or clotting activity of a material and is that portion of a substituted aromatic which couples with a diazonium salt.
Claim 3
Dependent Claim
32 words
A compound in accordance with claim 1 wherein R is hydrogen and R 1 is selected from the group consisting of hydrogen, chlorine, bromine, and alkyl from one to three carbon atoms.
Claim 4
Dependent Claim
22 words
A compound in accordance with claim 2 wherein R and R 1 are hydrogen and R 2 is derived from 8-amino-1-naphthol-5,7-disulfonic acid.
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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |