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US3208964A
Expired / Lapsed
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Suspension of polyvinylpyridine in aqueous polyvinyl alcohol solution
Assignee: Polaroid Corp
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Filing: 1962-04-19
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Granted: 1965-09-28
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Claude F Valle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:30
CPC Classifications
C; C08; C08F; C08F261/00; C08F261/02; C08F261/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A NOVEL COMPOSITION OF MATTER COMPRISING A SUSPENSION OF INSOLUBLE PARTICLES OF POYLVINYLPYRIDINE IN AN AQUEOUS SOLUTION OF POLYVINYL ALCOHOL, THE RATIO OF SAID POLYVINYL ALCOHOL TO SAID POLYVINYLPYRIDINE, BY WEIGHT, BEING FROM 4:1 TO 1:2.
Claim 2
Dependent Claim
36 words
A NOVEL COMPOSITION OF MATTER COMPRISING A SUSPENSION OF INSOLUBLE PARTICLES OF POYLVINYLPYRIDINE IN AN AQUEOUS SOLUTION OF POLYVINYL ALCOHOL, THE RATIO OF SAID POLYVINYL ALCOHOL TO SAID POLYVINYLPYRIDINE, BY WEIGHT, BEING FROM 4:1 TO 1:2.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |