← Back to Patent Explorer
US3873713A Expired / Lapsed US ⏱️ 0.0 years remaining

Stabilized particulate vitamin c composition

Assignee: F Hoffmann La Roche AG
•
Filing: 1973-07-02
•
Granted: 1975-03-25
•
Expires: 1993-07-02
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

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 16:16
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.

References Cited (Backward Citations)

US2400171A Cited
US2454749A Cited
US2454747A Cited
US2512192A Cited
US3202731A Cited
US3106492A Cited
US3197369A Cited
US3279996A Cited

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

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag