Patent US2852433A successfully refreshed from Google Patents.
US2852433A
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Method of making enteric medicament compositions
Assignee: Eastman Kodak Co
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Filing: 1956-03-07
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Granted: 1958-09-16
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Expires: 1976-03-07
Abstract
No abstract record available.
Inventors
- 👤 Gordon D Hiatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2022; A61K9/205; A61K9/2054; A61K9/14; A61K9/141; A61K9/146; A61K9/2027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS OF FORMING A MATERIAL HAVING ENTERIC PROPERTIES WHICH COMPRISES DISSOLVING A SUBSTANTIAL PROORTION OF AN ENTERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE DICARBOXYLIC ACID ESTERS OF CELLULOSE DERIVATIVES, OF POLYVINYL ALCOHOL AND OF POLYVINYL ACETATE IN A MELT OF A MEDICAMENT SELECTED FROM THE GROUP CONSISTING OF ASPIRIN, MANDELIC ACID, ACETANILIDE, AND PHENACETIN AT 120-150*C. AND COOLING THE MOLTEN MASS IN CONVENIENT FORM.
Claim 2
Dependent Claim
67 words
A PROCESS OF FORMING A MATERIAL HAVING ENTERIC PROPERTIES WHICH COMPRISES DISSOLVING A SUBSTANTIAL PROORTION OF AN ENTERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE DICARBOXYLIC ACID ESTERS OF CELLULOSE DERIVATIVES, OF POLYVINYL ALCOHOL AND OF POLYVINYL ACETATE IN A MELT OF A MEDICAMENT SELECTED FROM THE GROUP CONSISTING OF ASPIRIN, MANDELIC ACID, ACETANILIDE, AND PHENACETIN AT 120-150*C. AND COOLING THE MOLTEN MASS IN CONVENIENT FORM.
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |