US2706701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of iodinepolyvinylpyrrolidone by dry mixing
Assignee: GAF Chemicals Corp
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Filing: 1952-04-15
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Granted: 1955-04-19
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Expires: 1972-04-15
Abstract
No abstract record available.
Inventors
- 👤 Beller Hans
- 👤 Hosmer William Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:04
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; C08F8/22; C08K; C08K3/00; C08K3/16; C08K3/18; C08K3/24; C08K3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE METHOD OF PRODUCING A STABLE POLYVINYLPRROLIDONE-IODINE COMPOSITION WHICH COMPRISES THOROUGHLY MIXING ELEMENTAL IODINE AND POWDERED POLYMERIC 1 VINYL 2 PYRROLIDONE AND HEATING SAID MIXTURE UNTIL THE RATIO OF AVAILABLE IODINE TO IODIDE ION IN SAID COMPOSITION IS SUBSTANTIALLY 2:1.
Claim 2
Independent Claim
40 words
THE METHOD OF PRODUCING A STABLE POLYVINYLPRROLIDONE-IODINE COMPOSITION WHICH COMPRISES THOROUGHLY MIXING ELEMENTAL IODINE AND POWDERED POLYMERIC 1 VINYL 2 PYRROLIDONE AND HEATING SAID MIXTURE UNTIL THE RATIO OF AVAILABLE IODINE TO IODIDE ION IN SAID COMPOSITION IS SUBSTANTIALLY 2:1.
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) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |