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US4693892A
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Gelatin containing β-carotene
Assignee: Bayer AG
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Filing: 1986-09-05
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Granted: 1987-09-15
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Expires: 2006-09-05
Abstract
Abstract Light-fast capsules for dihydropyridines such as nifedipine and nisoldipine are formed of gelatin colored with a mixture of β-carotene and iron oxide.
Inventors
- 👤 Ahmed Hegasy
- 👤 Manfred Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:41
CPC Classifications
C; C09; C09B; C09B61/00; A; A61; A61K; A61K9/00; A61K9/48; A61K9/4816; A61K9/4825; C09B67/00; C09B67/0033
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
27 words
A light-fast opaque coloring composition comprising by weight a mixture of about 1 to 25 parts of β-carotene and about 1 to 25 parts of iron oxide.
Claim 2
Dependent Claim
27 words
A light-fast opaque coloring composition comprising by weight a mixture of about 1 to 25 parts of β-carotene and about 1 to 25 parts of iron oxide.
Claim 3
Dependent Claim
25 words
A composition according to claim 1, comprising by weight about 3 to 18 parts of β-carotene and about 1 to 6 parts of iron oxide.
Claim 4
Dependent Claim
10 words
A composition according to claim 1, further comprising titanium dioxide.
Claim 5
Dependent Claim
23 words
A composition according to claim 1, further comprising gelatin, the β-carotene being present in about 0.02 to 0.5% by weight of the gelatin.
Claim 6
Dependent Claim
11 words
A gelatin capsule formed of a composition according to claim 4.
Claim 7
Dependent Claim
10 words
A capsule according to claim 5, further comprising titanium dioxide.
Claim 8
Dependent Claim
8 words
A capsule according to claim 5, containing nifedipine.
Claim 9
Dependent Claim
8 words
A capsule according to claim 5, containing nisoldipine.
References Cited (Backward Citations)
US3784684A
Cited
US4268265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |