US2971889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Press coated enteric tablets and process for preparing them
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1958-03-18
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Granted: 1961-02-14
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Expires: 1978-03-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph V Swintosky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:10
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2806; A61K9/282; A61K9/2893
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PRESS COATED ENTERIC TABLET COMPRISING A MEDICAMENT CORE COMPLETELY SURROUNDED BY A GRANULATION MIXTURE COMPRISED OF ABOUT 50-98% OF A PHARMACEUTICALLY ACCEPTABLE ORGANIC ACID WITH A DISSOCIATION CONSTANT OF FROM ABOUT 1 X 10-3 TO ABOUT 1 X 10-7 AND A SOLUBILITY IN WATER OF LESS THAN ABOUT 1%, WEIGHT TO VOLUME, AND A PHARMACEUTICAL BINDER, SAID GRANULATION BEING COMPRESSED AROUND THE MEDICAMENT CORE.
Claim 2
Dependent Claim
65 words
A PRESS COATED ENTERIC TABLET COMPRISING A MEDICAMENT CORE COMPLETELY SURROUNDED BY A GRANULATION MIXTURE COMPRISED OF ABOUT 50-98% OF A PHARMACEUTICALLY ACCEPTABLE ORGANIC ACID WITH A DISSOCIATION CONSTANT OF FROM ABOUT 1 X 10-3 TO ABOUT 1 X 10-7 AND A SOLUBILITY IN WATER OF LESS THAN ABOUT 1%, WEIGHT TO VOLUME, AND A PHARMACEUTICAL BINDER, SAID GRANULATION BEING COMPRESSED AROUND THE MEDICAMENT CORE.
References Cited (Backward Citations)
US2071511A
Cited
US2757124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |