Patent US2702264A successfully refreshed from Google Patents.
US2702264A
Expired / Lapsed
US
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Enteric coated tablet
Assignee: F Hoffmann La Roche AG
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Filing: 1951-03-08
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Granted: 1955-02-15
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Expires: 1971-03-08
Abstract
No abstract record available.
Inventors
- 👤 Klaui Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:45
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/2833; A61K9/286; A61K9/2866; A61K9/282; A61K9/284; A61K9/2846; B; B01; B01J; B01J13/00; B01J13/02; B01J13/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
AN ENTERIC COATED TABLET COMPRISING A THEREAPEUTICALLY ACTIVE MATERIAL SURROUNDED BY A COATING WHICH CONTAINS, IN PREDOMINANT PROPORTIONS, A MIXTURE OF (1) A DIFFIUCLTY WATER-SOLUBLE TO WATER-INSOLUBLE SYNTHETIC FILM-FORMING POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ACETATE, PARTIALLY HYDROLYZED POLYVINYL ACETATE, COPOLYMERS OF VINYL ACETATE WITH VINYL CHLORIDE, AND METHYL ESTERS OF POLYACRYLIC ACID AND OF POLYMETHACRYLIC ACID, AND (2) AN ACID GROUP-CARRYING SYNTHETIC POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYACRYLIC ACID AND POLYMETHACRYLIC ACID.
Claim 2
Dependent Claim
77 words
AN ENTERIC COATED TABLET COMPRISING A THEREAPEUTICALLY ACTIVE MATERIAL SURROUNDED BY A COATING WHICH CONTAINS, IN PREDOMINANT PROPORTIONS, A MIXTURE OF (1) A DIFFIUCLTY WATER-SOLUBLE TO WATER-INSOLUBLE SYNTHETIC FILM-FORMING POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ACETATE, PARTIALLY HYDROLYZED POLYVINYL ACETATE, COPOLYMERS OF VINYL ACETATE WITH VINYL CHLORIDE, AND METHYL ESTERS OF POLYACRYLIC ACID AND OF POLYMETHACRYLIC ACID, AND (2) AN ACID GROUP-CARRYING SYNTHETIC POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYACRYLIC ACID AND POLYMETHACRYLIC ACID.
References Cited (Backward Citations)
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US2072303A
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US2066105A
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US2215196A
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Cited
US2390088A
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US2419880A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |