US2900305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of iodine polyvinylpyrrolidone adducts
Assignee: GAF Chemicals Corp
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Filing: 1956-08-09
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Granted: 1959-08-18
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Expires: 1976-08-09
Abstract
No abstract record available.
Inventors
- 👤 Siggia Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
A; A61; A61K; A61K33/00; A61K33/18; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58; C; C08; C08F; C08F8/00; C08F8/18; C08F8/20; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
PROCESS FOR THE PREPARATION OF A POLYVINYLPYRROLIDONE-IODINE COMPOSITION WHICH IS STABLE IN AQUEOUS SOLUTION, WHICH COMPRISES THOROUGHLY MIXING ELEMENTAL IODINE AND POWDERED 1-VINYL-2-PYRROLIDONE POLYMER CONTAINING FROM 4.9-13.2% WATER, AND HEATING THE RESULTING COMPOSITION AT A TEMPERATURE OF FROM ABOUT 90 TO 100*C. UNTIL A PRODUCT CONTAINING AN APPRECIABLE AMOUNT OF AVAILABLE IODINE IS OBTAINED.
Claim 2
Dependent Claim
54 words
PROCESS FOR THE PREPARATION OF A POLYVINYLPYRROLIDONE-IODINE COMPOSITION WHICH IS STABLE IN AQUEOUS SOLUTION, WHICH COMPRISES THOROUGHLY MIXING ELEMENTAL IODINE AND POWDERED 1-VINYL-2-PYRROLIDONE POLYMER CONTAINING FROM 4.9-13.2% WATER, AND HEATING THE RESULTING COMPOSITION AT A TEMPERATURE OF FROM ABOUT 90 TO 100*C. UNTIL A PRODUCT CONTAINING AN APPRECIABLE AMOUNT OF AVAILABLE IODINE IS OBTAINED.
References Cited (Backward Citations)
US2706701A
Cited
US2754245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |