US3656997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated gelatin capsules and process for producing same
Assignee: Sanol Schwarz GmbH
•
Filing: 1970-05-11
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Granted: 1972-04-18
•
Expires: 1990-05-11
Abstract
Abstract Gelatin capsules filled with an active ingredient or ingredients are protected against solution in the stomach in order that they may reach the intestines and be absorbed therein by providing said capsules with a primary lacquer containing a soluble filmforming colloidal material soluble both in water and in organic solvents and then with a lacquer unaffected by gastric juices and soluble in intestinal juices.
Inventors
- 👤 Guenter Cordes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:06
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/4891
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
25 words
A process as defined in claim 1, wherein the primary lacquer is sprayed on in a quantity of from 0.1 to 10 mg. per capsule.
Claim 2
Dependent Claim
20 words
The process as defined in claim 1, wherein the lacquer unaffected by gastric juices is a cellulose acetate phthalate lacquer.
Claim 3
Dependent Claim
92 words
A transportable and storable gelatin capsule filled with an active ingredient or ingredients which is unaffected by gastric juices and soluble iN the small intestines wherein said gelatin capsule has a two-layer lacquer coating thereon comprising a primary lacquer selected from the group consisting of polyvinyl pyrrolidone having a molecular weight of from about 104 to 106, hydroxymethyl propyl cellulose, a carboxyvinyl polymer with a molecular weight of about 2 X 106, and mixtures thereof, and a secondary lacquer on said primary lacquer, said secondary lacquer being a cellulose acetate phthalate lacquer.
References Cited (Backward Citations)
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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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |