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Patent US4832955A successfully refreshed from Google Patents.
US4832955A
Expired / Lapsed
US
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Controlled release potassium chloride composition
Assignee: Actavis Laboratories UT Inc
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Filing: 1988-02-26
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Granted: 1989-05-23
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Expires: 2008-02-26
Abstract
Abstract The invention is directed to a pharmaceutical composition comprising a microencapsulated potassium salt encapsulated in a shell wall consisting essentially of from about 85% to about 97% ethyl cellulose and from about 3% to about 15% of an amphiphile based on the weight of the shell wall; wherein the weight of said shell wall is from about 3% to about 15% of the total weight of the microencapsulated potassium salt.
Inventors
- 👤 Wallace C. Snipes
- 👤 Stephen J. Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:35
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; A61K9/5005; A61K9/5021; A61K9/5036; A61K9/5042; A61K9/5047; A61K33/00; A61K33/14; A61K9/5015
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
65 words
A pharmaceutical composition comprising a microencapsulated potassium salt encapsulated in a shell wall consisting essentially of from about 85% to about 97% ethyl cellulose and from about 3% to about 15% of an amphiphile based on the weight of the shell wall; wherein the weight of said shell wall is from about 3% to about 15% of the total weight of said microencapsulated potassium salt.
Claim 2
Dependent Claim
65 words
A pharmaceutical composition comprising a microencapsulated potassium salt encapsulated in a shell wall consisting essentially of from about 85% to about 97% ethyl cellulose and from about 3% to about 15% of an amphiphile based on the weight of the shell wall; wherein the weight of said shell wall is from about 3% to about 15% of the total weight of said microencapsulated potassium salt.
Claim 3
Dependent Claim
12 words
A composition according to claim 1 wherein said salt is potassium chloride.
Claim 4
Dependent Claim
15 words
A composition according to claim 2 wherein said amphiphile is a C 12-20 fatty acid.
Claim 5
Dependent Claim
21 words
A composition according to claim 3 wherein said amphiphile is lauric acid, myristic acid, palmitic acid, stearic acid and arachidic acid.
Claim 6
Dependent Claim
20 words
A composition according to claim 4 wherein said amphiphile is selected from the group consisting of myristic and palmitic acid.
Claim 7
Dependent Claim
30 words
A composition according to claim 1 wherein in said shell wall, ethyl cellulose is present at from about 85% to about 95% based on the weight of the shell wall.
Claim 8
Dependent Claim
26 words
A composition according to claim 6 wherein said ethyl cellulose is present at about 89% to about 91% based on the weight of the shell wall.
Claim 9
Dependent Claim
14 words
A composition according to claim 7 wherein said ethyl cellulose is present at 91%.
Claim 10
Dependent Claim
29 words
A composition according to claim 7 wherein in said shell wall said amphiphile is present from about 8.5% to about 9.5% based on the weight of the shell wall.
Claim 11
Dependent Claim
14 words
A composition according to claim 9 wherein said amphiphile is present at about 9%.
Claim 12
Dependent Claim
11 words
A composition according to claim 1 contained in a gelatin capsule.
Claim 13
Dependent Claim
29 words
A composition according to claim 1 wherein the weight of said shell wall is from about 7% to about 13% of the total weight of said microencapsulated potassium salt.
Claim 14
Dependent Claim
20 words
A composition according to claim 11 wherein the weight of said shell wall is from about 8.5% to about 9.5%.
Claim 15
Dependent Claim
16 words
A composition according to claim 12 wherein the weight of said shell wall is about 9%.
Claim 16
Dependent Claim
60 words
Microencapsulated potassium salt wherein said microcapsule shell wall consists essentially of from about 85% to about 97% ethyl cellulose and from about 3% to about 15% of an amphiphile based on the weight of the shell wall; wherein the weight of the shell wall is from about 3% to about 15% of the total weight of the microencapsulated potassium salt.
Claim 17
Dependent Claim
60 words
Microencapsulated potassium salt wherein said microcapsule shell wall consists essentially of from about 85% to about 97% ethyl cellulose and from about 3% to about 15% of an amphiphile based on the weight of the shell wall; wherein the weight of the shell wall is from about 3% to about 15% of the total weight of the microencapsulated potassium salt.
Claim 18
Dependent Claim
13 words
Microencapsulated potassium salt according to claim 15 wherein said salt is potassium chloride.
Claim 19
Dependent Claim
22 words
Microencapsulated potassium chloride according to claim 16 wherein said amphiphile is lauric acid, myristic acid, palmitic acid, stearic acid and arachidic acid.
Claim 20
Dependent Claim
16 words
Microencapsulated potassium chloride according to claim 17 wherein said amphiphile is myristic acid or palmitic acid.
References Cited (Backward Citations)
US3960757A
Cited
US4713248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |