Patent US3873713A successfully refreshed from Google Patents.
US3873713A
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Stabilized particulate vitamin c composition
Assignee: F Hoffmann La Roche AG
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Filing: 1973-07-02
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Granted: 1975-03-25
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Expires: 1993-07-02
Abstract
Abstract A stable particulate vitamin C composition is described which comprises ascorbic acid, isoascorbic acid, or a salt or ester of either in the form of discrete particles, each particle of which is substantially uniformly coated with an organic polysiloxane. The polysiloxane coating, which does not substantially alter the size or shape of the particles, gives said particles excellent flow properties and stability and facilitates compression of such particles into tablets.
Inventors
- 👤 Walter Haas
- 👤 Hans-Gunther Zeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:20
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06; A; A61; A61K; A61K31/00; A61K31/33; A61K31/335; A61K31/365; A61K31/375; A61K9/00; A61K9/20; A61K9/2072; A61K9/2077; A61K9/2081; A61K9/48; A61K9/50; A61K9/5005; A61K9/5021; A61K9/5031; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
177 words
A STABLE, VITAMIN C ACTIVE COMPOSITION CONSISTING ESSENTIALLY OF FREE-FLOWING, NON-AGGLOMERATING, DISCRETE PARTICLES COMPRISING A VITAMIN C ACTIVE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ASCORBIC ACID, ISOASCORBIC ACID, A SALT OF ASCORBIC ACID EITH A MEDICINALLY ACCEPTABLE BASE, A SALT OF ISOACORBIC ACID WITH A MEDICINALLY ACCEPTABLE BASE, AN ESTER OF ASCORBIC ACID WITH AN ALIPHATIC ALCOHOL CONTAINING FROM ONE TO SEVENTEEN CARBON ATOMS AND AN ESTER OF ISOASCORBIC ACID WITH AN ALIPHATIC ALCOHOL CONTAINING FROM ONE TO SEVENTEEN CARBON ATOMS, EACH INDIVIDUAL DISCRETE PARTICLE HAVING A SUBSTANTIALLY UNIFORM COATING CONSISTING OF AN ORGANIC POLYSILOXANE OBTAINED BY THE IN SITU POYLMERIZATION ON EACH DISCRETE PARTICLE, SAID PARTICLES BEING MAINTAINED PHYSICALLY SEPARATE, OF A SOLUTION CONTAINING FROM ABOUT 10 PERCENT BY WEIGHT TO ABOUT 50 PERCENT BY WEIGHT OF A SILOXANE SELECTED FROM THE GROUP CONSISTING OF METHYL SILOXANE AND PHENYL SILOXANE IN AN INERT, VOLATILE ORGANIC SOLVENT AT A TEMPERATURE OF FROM ABOUT ROOM TEMPERATURE TO ABOUT 150*C, SAID COATING COMPRISING FROM ABOUT 1 PERCENT BY WEIGHT TO ABOUT 20 PERCENT BY WEIGHT OF SAID COMPOSITION.
Claim 2
Dependent Claim
177 words
A STABLE, VITAMIN C ACTIVE COMPOSITION CONSISTING ESSENTIALLY OF FREE-FLOWING, NON-AGGLOMERATING, DISCRETE PARTICLES COMPRISING A VITAMIN C ACTIVE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ASCORBIC ACID, ISOASCORBIC ACID, A SALT OF ASCORBIC ACID EITH A MEDICINALLY ACCEPTABLE BASE, A SALT OF ISOACORBIC ACID WITH A MEDICINALLY ACCEPTABLE BASE, AN ESTER OF ASCORBIC ACID WITH AN ALIPHATIC ALCOHOL CONTAINING FROM ONE TO SEVENTEEN CARBON ATOMS AND AN ESTER OF ISOASCORBIC ACID WITH AN ALIPHATIC ALCOHOL CONTAINING FROM ONE TO SEVENTEEN CARBON ATOMS, EACH INDIVIDUAL DISCRETE PARTICLE HAVING A SUBSTANTIALLY UNIFORM COATING CONSISTING OF AN ORGANIC POLYSILOXANE OBTAINED BY THE IN SITU POYLMERIZATION ON EACH DISCRETE PARTICLE, SAID PARTICLES BEING MAINTAINED PHYSICALLY SEPARATE, OF A SOLUTION CONTAINING FROM ABOUT 10 PERCENT BY WEIGHT TO ABOUT 50 PERCENT BY WEIGHT OF A SILOXANE SELECTED FROM THE GROUP CONSISTING OF METHYL SILOXANE AND PHENYL SILOXANE IN AN INERT, VOLATILE ORGANIC SOLVENT AT A TEMPERATURE OF FROM ABOUT ROOM TEMPERATURE TO ABOUT 150*C, SAID COATING COMPRISING FROM ABOUT 1 PERCENT BY WEIGHT TO ABOUT 20 PERCENT BY WEIGHT OF SAID COMPOSITION.
Claim 3
Dependent Claim
34 words
The stable composition of claim 1 wherein said vitamin C active substance is ascorbic acid and said coating comprises from about 3 percent by weight to about 6 percent by weight of said composition.
Claim 4
Dependent Claim
13 words
The stable composition of claim 2 wherein said organic polysiloxane is methyl polysiloxane.
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |