Patent US2485089A successfully refreshed from Google Patents.
Patent US4046805A successfully refreshed from Google Patents.
US4046805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted-hydroxy-naphthalenedisulfonic acid compounds
Assignee: Wyeth Holdings LLC
•
Filing: 1976-05-10
•
Granted: 1977-09-06
•
Expires: 1996-05-10
Abstract
Abstract Substituted-hydroxy-naphthalenedisulfonic acids, acid ureides and salts thereof useful as complement inhibitors.
Inventors
- 👤 Seymour Bernstein
- 👤 Robert Herman Lenhard
- 👤 Milton David Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:04
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/78; C07C309/86; C07C309/88; C07C309/01; C07C309/28; C07C309/45; C07C309/51
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
31 words
A compound selected from those of the formula: ##STR10## and A is hydrogen, alkali metal or alkaline earth metal, with the proviso that each A is identical in the same compound.
Claim 2
Dependent Claim
31 words
A compound selected from those of the formula: ##STR10## and A is hydrogen, alkali metal or alkaline earth metal, with the proviso that each A is identical in the same compound.
Claim 3
Dependent Claim
9 words
A compound selected from those of the formula: ##STR11##
Claim 4
Dependent Claim
9 words
A compound selected from those of the formula: ##STR11##
Claim 5
Dependent Claim
10 words
A compound according to claim 2, 4-hydroxy-5-{m-[3-(α,α,α-trifluoro-m-tolyl)ureido]benzamido}-2,7-naphthalenedisulfonic acid, disodium salt.
Claim 6
Dependent Claim
10 words
A compound according to claim 2, 4-{m-{3-[p(fluorosulfonyl)phenyl]ureido}benzamido}-5-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt.
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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |