US3330729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release tablet containing medicament admixed in a waterinsoluble acrylic acid cross-linked polymer and selected basic magnesium or calcium diluent
Assignee: Goodrich Corp
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Filing: 1963-10-04
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Granted: 1967-07-11
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Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:07
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2022; A61K9/2027; A61K9/2009
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A SUSTAINED RELEASE PHARMACEUTICAL TABLET FOR ORAL ADMINISTRATION IN THE FORM OF A COMPRESSED, SUBSTANTIALLY UNIFORM MIXTURE COMPRISING (A) AN EFFECTIVE AMOUNT OF MEDICAMENT, (B) AT LEAST 5% BY WEIGHT OF A WATERABSORBENT POLYMER OF ACRYLIC ACID CROSS-LINKED WITH FROM ABOUT 0.75 TO ABOUT 2%, BASED ON THE WEIGHT OF THE POLYMER, OF A POLYALKENYL POLYETHER, AND (C) AT LEAST ONE BASIC DILUENT SELECTED FROM THE GROUP CONSISTING OF CALCIUM HYDROXIDE, MAGNESIUM HYDROXIDE AND MAGNESIUM OXIDE, THE WEIGHT RATIO OF POLYMER TO BASIC DILUENT BEING WITHIN THE RANGE OF ABOUT 0.3:1 TO ABOUT 10:1.
Claim 2
Dependent Claim
94 words
A SUSTAINED RELEASE PHARMACEUTICAL TABLET FOR ORAL ADMINISTRATION IN THE FORM OF A COMPRESSED, SUBSTANTIALLY UNIFORM MIXTURE COMPRISING (A) AN EFFECTIVE AMOUNT OF MEDICAMENT, (B) AT LEAST 5% BY WEIGHT OF A WATERABSORBENT POLYMER OF ACRYLIC ACID CROSS-LINKED WITH FROM ABOUT 0.75 TO ABOUT 2%, BASED ON THE WEIGHT OF THE POLYMER, OF A POLYALKENYL POLYETHER, AND (C) AT LEAST ONE BASIC DILUENT SELECTED FROM THE GROUP CONSISTING OF CALCIUM HYDROXIDE, MAGNESIUM HYDROXIDE AND MAGNESIUM OXIDE, THE WEIGHT RATIO OF POLYMER TO BASIC DILUENT BEING WITHIN THE RANGE OF ABOUT 0.3:1 TO ABOUT 10:1.
References Cited (Backward Citations)
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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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |