Patent US4935246A successfully refreshed from Google Patents.
US4935246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the coating of granules
Assignee: Hoechst AG
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Filing: 1988-06-29
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Granted: 1990-06-19
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Expires: 2008-06-29
Abstract
Abstract A process is described for the coating of granules containing wax-like substances, in an apparatus having a rapidly rotating horizontal disk located in a vertical container, in the presence of one or more wax-like substances or a mixture of one or more was-like substances, wherein the wax-like substances in powder form are scattered onto the granules which have been heated until the wax-like substance has softened.
Inventors
- 👤 Gerhard Ahrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:31
CPC Classifications
B; B01; B01J; B01J2/00; B01J2/006; A; A61; A61K; A61K9/00; A61K9/14; A61K9/16; A61K9/167; A61K9/48; A61K9/50; A61K9/5073; B01J2/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
A process for coating a rounded or non-rounded granule in an apparatus having a rapidly rotating horizontal disk located in a vertical container, which comprises scattering a wax-like substance or a mixture of wax-like substances in powder form and in the absence of liquid onto the granule, said granule containing a wax-like substance and being heated until the wax-like substance contained therein has softened.
Claim 2
Dependent Claim
64 words
A process for coating a rounded or non-rounded granule in an apparatus having a rapidly rotating horizontal disk located in a vertical container, which comprises scattering a wax-like substance or a mixture of wax-like substances in powder form and in the absence of liquid onto the granule, said granule containing a wax-like substance and being heated until the wax-like substance contained therein has softened.
Claim 3
Dependent Claim
26 words
The process as claimed in claim 1, wherein the wax-like substance or mixture of wax-like substances is scattered in admixture with one or more active compounds.
Claim 4
Dependent Claim
27 words
The process as claimed in claim 1, wherein the granule is given a spherical shape, prior to the coating, by prolonged rotation and heating with plastic deformation.
Claim 5
Dependent Claim
27 words
The process as claimed in claim 1, wherein the granule to be coated contains a hydrophobic wax-like substance or a mixture of hydrophilic and hydrophobic wax-like substances.
Claim 6
Dependent Claim
41 words
The process as claimed in claim 1, wherein fatty alcohols or their derivatives, fatty acids and their derivatives, hydrocarbons, waxes or polyethylene glycols and their derivatives having a melting point in excess of 20° C. are used as the wax-like substance.
Claim 7
Dependent Claim
14 words
A granule having a wax-like coating, obtainable by the process according to claim 1.
Claim 8
Dependent Claim
13 words
The process of claim 2, wherein the substance further contains a non-wax-like auxiliary.
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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) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |