Patent US4568560A successfully refreshed from Google Patents.
US4568560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated fragrances and flavors and process therefor
Assignee: Warner Lambert Co LLC
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Filing: 1984-03-16
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Granted: 1986-02-04
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Expires: 2004-03-16
Abstract
Abstract Process for preparing a controlled release encapsulated active agent by encapsulating the active agent in a coating composition comprising a water insoluble film forming composition, an enteric compound and a plasticizer for the film forming composition.
Inventors
- 👤 Alexander M. Schobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
A; A23; A23G; A23G4/00; A23G4/18; A23G4/20; A61; A61K; A61K8/00; A61K8/02; A61K8/11; A61K8/18; A61K8/92; A61K8/922; A61Q; A61Q11/00; A61Q11/02; A23V; A23V2002/00; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
160 words
A process for preparing a controlled release encapsulated active agent which comprises: encapsulating the active agent selected from the group consisting of flavoring agents and fragrances in a coating composition wherein the coating composition is applied by spray coating a coating solution or a coating emulsion of the coating composition onto the active agent said coating solution or coating emulsion comprising about 8 to about 30% (w/w) of coating composition based on the weight of emulsion or solution the coating composition comprising a water insoluble film forming composition, an enteric compound and a plasticizer for the film forming composition, wherein the weight ratio of film forming composition to enteric compound is about 5:1 to about 0.5:1, said coating composition comprising about 10% to about 25% by weight of the encapsulated active agent based on the weight of active agent plus coating, and said plasticizer comprising about 18% to about 40% by weight of the weight of the film former solids.
Claim 2
Dependent Claim
160 words
A process for preparing a controlled release encapsulated active agent which comprises: encapsulating the active agent selected from the group consisting of flavoring agents and fragrances in a coating composition wherein the coating composition is applied by spray coating a coating solution or a coating emulsion of the coating composition onto the active agent said coating solution or coating emulsion comprising about 8 to about 30% (w/w) of coating composition based on the weight of emulsion or solution the coating composition comprising a water insoluble film forming composition, an enteric compound and a plasticizer for the film forming composition, wherein the weight ratio of film forming composition to enteric compound is about 5:1 to about 0.5:1, said coating composition comprising about 10% to about 25% by weight of the encapsulated active agent based on the weight of active agent plus coating, and said plasticizer comprising about 18% to about 40% by weight of the weight of the film former solids.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the film former is ethylcellulose, the enteric compound is an acrylic polymer and the plasticizer is dibutyl sebacate.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the plasticizer comprises about 20 to about 30% (w/w) of the film former solids.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein the coating composition comprises about 15% to about 20% by weight of the encapsulated active agent.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein the ratio of film former to enteric composition is about 1.5:1 to about 1:1.
Claim 7
Dependent Claim
22 words
The process of claim 1 wherein the active agent has a particle size range of about 20 mesh to about 50 mesh.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein the active agent is a flavoring agent.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein the active agent is a fragrance agent.
Claim 10
Dependent Claim
92 words
A composition of matter comprising an active agent selected from the group consisting of flavoring agents and fragrances said active agent being encapsulated in a continuous coating which comprises a film former, an enteric composition and a plasticizer for the film former wherein the weight ratio of film former to enteric composition is about 5:1 to about 0.5:1 said coating comprising about 10% to about 25% by weight of the encapsulated active agent, and said plasticizer comprising about 18% to about 40% by weight of the weight of the film former solids.
Claim 11
Dependent Claim
92 words
A composition of matter comprising an active agent selected from the group consisting of flavoring agents and fragrances said active agent being encapsulated in a continuous coating which comprises a film former, an enteric composition and a plasticizer for the film former wherein the weight ratio of film former to enteric composition is about 5:1 to about 0.5:1 said coating comprising about 10% to about 25% by weight of the encapsulated active agent, and said plasticizer comprising about 18% to about 40% by weight of the weight of the film former solids.
Claim 12
Dependent Claim
14 words
The composition according to claim 9 wherein the active agent is a flavoring agent.
Claim 13
Dependent Claim
14 words
The composition according to claim 9 wherein the active agent is a fragrance agent.
Claim 14
Dependent Claim
18 words
The composition according to claim 9 wherein the film former is ethylcellulose and the plasticizer is dibutyl sebacate.
Claim 15
Dependent Claim
14 words
The composition according to claim 9 wherein the enteric composition is an acrylic polymer.
Claim 16
Dependent Claim
16 words
The composition according to claim 9 wherein the weight ratio is about 1.5:1 to about 1:1.
Claim 17
Dependent Claim
20 words
The composition according to claim 9 wherein the coating comprises about 15% to about 20% by weight of the composition.
Claim 18
Dependent Claim
21 words
The composition according to claim 9 the plasticizer comprises about 20% to about 30% by weight of the film former solids.
Claim 19
Dependent Claim
23 words
The composition according to claim 9 wherein the active agent has a particle size range of about 20 mesh to about 50 mesh.
Claim 20
Dependent Claim
20 words
In a denture cleansing composition the improvement which comprises utilizing as a fragrance the encapsulated fragrance agent of claim 11.
Claim 21
Dependent Claim
20 words
In the chewing gum composition the improvement which comprises utilizing as a flavoring the encapsulated flavoring agent of claim 10.
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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) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |