US3130126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oral pharmaceutical products prepared with carboxymethyl benzyl dextran having a low carboxymethyl d. s. of 0.15
Assignee: Central Pharmacal Co
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Filing: 1962-09-14
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Granted: 1964-04-21
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Expires: 1982-09-14
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:52
CPC Classifications
A; A61; A61K; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58; A61K47/585
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE METHOD OF PREPARING AN ORAL SUSTAINED RELEASE PHARMACEUTICAL PRODUCT BY MIXING AN ALCOHOLIC SOLUTION OF CARBOXYMETHYL BENZYL DEXTRAN AND A MEDICAMENT TO FORM A COMPLEX PRODUCT HAVING SUSTAINED RELEASE PROPERTIES, THE IMPROVEMENT CONSISTING OF CARRYING OUT THE METHOD WITH A CARBOXYMETHYL BENZYL DEXTRAN COMPOSED OF BENZYLATED WATER-SOLUBLE DEXTRAN OF AN AVERAGE MOLECULAR WEIGHT BETWEEN 70,000 AND 85,000, THE RESULTANT CARBOXYMETHYL BENZYL DEXTRAN HAVING A LOW CARBOXYMETHYL D.S. OF 0.15 AND A HIGH BENZYL D.S. OF 1.5.
Claim 2
Dependent Claim
78 words
IN THE METHOD OF PREPARING AN ORAL SUSTAINED RELEASE PHARMACEUTICAL PRODUCT BY MIXING AN ALCOHOLIC SOLUTION OF CARBOXYMETHYL BENZYL DEXTRAN AND A MEDICAMENT TO FORM A COMPLEX PRODUCT HAVING SUSTAINED RELEASE PROPERTIES, THE IMPROVEMENT CONSISTING OF CARRYING OUT THE METHOD WITH A CARBOXYMETHYL BENZYL DEXTRAN COMPOSED OF BENZYLATED WATER-SOLUBLE DEXTRAN OF AN AVERAGE MOLECULAR WEIGHT BETWEEN 70,000 AND 85,000, THE RESULTANT CARBOXYMETHYL BENZYL DEXTRAN HAVING A LOW CARBOXYMETHYL D.S. OF 0.15 AND A HIGH BENZYL D.S. OF 1.5.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |