US3681089A
Expired / Lapsed
US
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Water soluble copolymers containing an entrapped flavoring agent
Assignee: National Patent Development Corp
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Filing: 1970-09-09
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Granted: 1972-08-01
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Expires: 1990-09-09
Abstract
Abstract FLAVORING AGENTS, DRUGS, FRAGRANCES, AND PESTICIDES ARE ENTRAPPED IN SOLID, HYDROPHILIC, WATER SOLUBLE COPOLYMERS OF A HYDROPHILIC HYDROXYALKYL ACRYLATE OR METHACRYLATE WITH A WATER SOLUBILIZING COMONOMER TO PROVIDE A READY SOURCE OF THE ENTRAPPED MATERIAL ON CONTACT WITH WATER.
Inventors
- 👤 Francis E Gould
- 👤 Thomas H Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:50
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/042; A01; A01N; A01N25/00; A01N25/18; A23; A23L; A23L27/00; A23L27/70; A23L27/74
Claims Analysis
Total Claims: 0
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |