Patent US3859433A successfully refreshed from Google Patents.
US3859433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiviral treatment
Assignee: Hercules LLC
•
Filing: 1973-04-30
•
Granted: 1975-01-07
•
Expires: 1993-04-30
Abstract
Abstract Certain water-soluble copolymers prepared from divinyl ether and maleic anhydride have been found to suppress virus growth. Administration of said copolymers not only suppresses growth in infected animals but also increases resistance to virus infection in healthy animals by stimulating the production of interferon.
Inventors
- 👤 William Regelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:32
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/74; A61K31/765
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS OF IMMUNIZING AN ANIMAL EXPOSED TO ENCEPHALOMYOCARDITIS VIRUS WHICH COMPRISES ADMINISTERING TO SAID ANIMAL AT LEAST ONE DOSAGE OF FROM ABOUT 0.5 TO 300 MG./KG. OF BODY WEIGHT OF AN ANTIVIRAL AGENT SELECTED FROM DIVINYL ETHER-MALEIC ANHYDRIDE COPOLYMERS AND PHYSIOLOGICALLY TOLERATED SALTS OF DIVINYL ETHER-MALEIC ANHYDRIDE COPOLYMERS, SAID COPOLYMERS CONTAINING DIVINYL ETHER AND MALEIC ANHYDRIDE IN A MOLE RATIO OF ABOUT 1:2 AND HAVING A REDUCED SPECIFIC VISCOSITY OF FROM ABOUT 0.4 TO ABOUT 1.8.
Claim 2
Dependent Claim
77 words
A PROCESS OF IMMUNIZING AN ANIMAL EXPOSED TO ENCEPHALOMYOCARDITIS VIRUS WHICH COMPRISES ADMINISTERING TO SAID ANIMAL AT LEAST ONE DOSAGE OF FROM ABOUT 0.5 TO 300 MG./KG. OF BODY WEIGHT OF AN ANTIVIRAL AGENT SELECTED FROM DIVINYL ETHER-MALEIC ANHYDRIDE COPOLYMERS AND PHYSIOLOGICALLY TOLERATED SALTS OF DIVINYL ETHER-MALEIC ANHYDRIDE COPOLYMERS, SAID COPOLYMERS CONTAINING DIVINYL ETHER AND MALEIC ANHYDRIDE IN A MOLE RATIO OF ABOUT 1:2 AND HAVING A REDUCED SPECIFIC VISCOSITY OF FROM ABOUT 0.4 TO ABOUT 1.8.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |