US4118522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for the coating of tablets
Assignee: Individual
•
Filing: 1977-02-10
•
Granted: 1978-10-03
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Expires: 1997-02-10
Abstract
Abstract For various purposes tablets are often provided with a coating. The coating processes are extremely time-consuming. To reduce the time for the manufacture of dragees the liquid coating material is applied to the tablet kernels in a vacuum.
Inventors
- 👤 Bruno Stellmach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:42
CPC Classifications
A; A61; A61J; A61J3/00; A61J3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A method of coating medicinal tablets comprising the steps of: introducing the tablets into a rotatable evaporating vessel; Evacuating said vessel to establish a vacuum therein of about 1 mmHg; rotating said vessel; and spraying a suspension comprising a solvent and a sugar-containing solid coating material onto said tablets, while said vessel is rotated and subject to said vaccum, to effect successive application of a plurality of thin, sugar-containing films on said tablets, and recovering said solvent for reuse as part of the coating suspension.
Claim 2
Independent Claim
85 words
A method of coating medicinal tablets comprising the steps of: introducing the tablets into a rotatable evaporating vessel; Evacuating said vessel to establish a vacuum therein of about 1 mmHg; rotating said vessel; and spraying a suspension comprising a solvent and a sugar-containing solid coating material onto said tablets, while said vessel is rotated and subject to said vaccum, to effect successive application of a plurality of thin, sugar-containing films on said tablets, and recovering said solvent for reuse as part of the coating suspension.
References Cited (Backward Citations)
DE1060093B
Cited
US3390648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-02 | 1982-04-03 | 1982-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-02 | 1986-04-03 | 1986-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-02 | 1990-04-03 | 1990-10-03 | $7700.00 | Window Closed / Lapsed |