US2949401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Buccal tablet containing vitamin a
Assignee: Dome Chemicals Inc
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Filing: 1958-07-28
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Granted: 1960-08-16
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Expires: 1978-07-28
Abstract
No abstract record available.
Inventors
- 👤 Irving B Wershaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:19
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/59
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A BUCCAL TABLET HAVING A HARDNESS OF AT LEAST 15 KILOGRAMS PER SQUARE CM., WHICH WILL NOT DISINTEGRATE WHEN PLACED IN WATER AT 37*C. IN LESS THAN ONE HOUR AND CONSISTING ESSENTIALLY OF A THOROUGH ADMIXTURE OF 10% TO 20% BY WEIGHT OF VITAMIN A ACETATE, .3% TO .4% BY WEIGHT OF AN ACID FROM THE GROUP CONSISTING OF CITRIC AND TARTARIC ACIDS, 3% TO 5% BY WEIGHT OF METHYL CELLULOSE, 0% TO .02% BY WEIGHT OF ASCORBIC ACID AND 74% TO 86% BY WEIGHT OF A FILLER CHEMICALLY INERT TO THE OTHER CONSTITUENTS OF THE TABLET.
Claim 2
Dependent Claim
97 words
A BUCCAL TABLET HAVING A HARDNESS OF AT LEAST 15 KILOGRAMS PER SQUARE CM., WHICH WILL NOT DISINTEGRATE WHEN PLACED IN WATER AT 37*C. IN LESS THAN ONE HOUR AND CONSISTING ESSENTIALLY OF A THOROUGH ADMIXTURE OF 10% TO 20% BY WEIGHT OF VITAMIN A ACETATE, .3% TO .4% BY WEIGHT OF AN ACID FROM THE GROUP CONSISTING OF CITRIC AND TARTARIC ACIDS, 3% TO 5% BY WEIGHT OF METHYL CELLULOSE, 0% TO .02% BY WEIGHT OF ASCORBIC ACID AND 74% TO 86% BY WEIGHT OF A FILLER CHEMICALLY INERT TO THE OTHER CONSTITUENTS OF THE TABLET.
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) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |