US2987445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drug composition
Assignee: Rohm and Haas Co
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Filing: 1958-10-10
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Granted: 1961-06-06
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Expires: 1978-10-10
Abstract
No abstract record available.
Inventors
- 👤 Charles L Levesque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:49
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2022; A61K9/2027; Y; Y10; Y10S; Y10S424/00; Y10S424/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A COMPOSITION IN ORAL DOSAGE FORM WHICH COMPRISES (A) A POROUS PLASTIC MATRIX WHICH IS SUBSTANTIALLY INERT TO GASTRO-INTESTINAL FLUIDS, SAID PLASTIC BEING PERMEABLE TO THE WATER COMPONENT OF GASTRO-INTESTINAL FLUIDS TO AT LEAST A SMALL EXTENT AND BEING SELECTED FROM THE GROUP CONSISTING OF CRYSTALLINE POLYMERS HAVING A MELTING POINT OF AT LEAST ABOUT 105*F. AND AMORPHOUS POLYMERS HAVING A GLASS POINT OF AT LEAST ABOUT 105*F. AND (B) AN AMOUNT OF A WATER SOLUBLE DRUG SUFFICIENT TO GIVE A PHARMACOLOGIC RESPONSE UPON INGESTION AND ABSORPTION, SAID DRUG BEING UNIFORMLY DISPERSED WITHIN THE PORES OF SAID PLASTIC MATRIX AND SAID COMPOSITION ADAPTED TO RELEASE AN EFFECTIVE AMOUNT OF THE DRUG GRADUALLY OVER A PERIOD OF TIME DURING WHICH THE DOSAGE FORM IS PRESENT IN THE BODY.
Claim 2
Dependent Claim
127 words
A COMPOSITION IN ORAL DOSAGE FORM WHICH COMPRISES (A) A POROUS PLASTIC MATRIX WHICH IS SUBSTANTIALLY INERT TO GASTRO-INTESTINAL FLUIDS, SAID PLASTIC BEING PERMEABLE TO THE WATER COMPONENT OF GASTRO-INTESTINAL FLUIDS TO AT LEAST A SMALL EXTENT AND BEING SELECTED FROM THE GROUP CONSISTING OF CRYSTALLINE POLYMERS HAVING A MELTING POINT OF AT LEAST ABOUT 105*F. AND AMORPHOUS POLYMERS HAVING A GLASS POINT OF AT LEAST ABOUT 105*F. AND (B) AN AMOUNT OF A WATER SOLUBLE DRUG SUFFICIENT TO GIVE A PHARMACOLOGIC RESPONSE UPON INGESTION AND ABSORPTION, SAID DRUG BEING UNIFORMLY DISPERSED WITHIN THE PORES OF SAID PLASTIC MATRIX AND SAID COMPOSITION ADAPTED TO RELEASE AN EFFECTIVE AMOUNT OF THE DRUG GRADUALLY OVER A PERIOD OF TIME DURING WHICH THE DOSAGE FORM IS PRESENT IN THE BODY.
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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |