US4004036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Effervescent molded triturate tablets
Assignee: Alberto Culver Co
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Filing: 1970-03-20
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Granted: 1977-01-18
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Expires: 1990-03-20
Abstract
Abstract Preparation of effervescent molded triturate tablets which are rapidly disintegratable and soluble or dispersible in hot or cold aqueous media, said tablets comprising a mixture including two separate, originally pulverulent materials, which are capable of reacting in the presence of water to produce a gas, for instance, sodium bicarbonate and citric acid, the tablets being characterized by the presence of a substantial percentage of voids, generally in the range of 15% to 35%, in the interior of said tablet resulting from the limited interaction of a very minor proportion of said separate, originally pulverulent materials during the production of said molded tablet.
Inventors
- 👤 William H. Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:41
CPC Classifications
A; A23; A23L; A23L2/00; A23L2/40; A61; A61K; A61K9/00; A61K9/0002; A61K9/0007
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A method of preparing effervescent molded triturate tablets which are rapidly disintegratable and soluble or dispersible in hot or cold aqueous media, which comprises providing a mixture of pulverulent materials containing two separate ingredients capable of reacting in the presence of water to produce a gas, triturating said mixture, in the presence of a limited amount of water, to form a moldable mass with a volatile organic solvent ingredient in which at least one of said pulverulent materials is at least partially soluble, said limited amount of water not exceeding 10% by weight of said volatile organic solvent, molding said mass into tablet form, said separate gas-forming ingredients interacting to a substantially limited extent to form a small amount of gas in each tablet, and then removing said organic solvent from said tablets, said gas serving to form a substantial number of voids in the bodies of said tablets.
Claim 2
Independent Claim
149 words
A method of preparing effervescent molded triturate tablets which are rapidly disintegratable and soluble or dispersible in hot or cold aqueous media, which comprises providing a mixture of pulverulent materials containing two separate ingredients capable of reacting in the presence of water to produce a gas, triturating said mixture, in the presence of a limited amount of water, to form a moldable mass with a volatile organic solvent ingredient in which at least one of said pulverulent materials is at least partially soluble, said limited amount of water not exceeding 10% by weight of said volatile organic solvent, molding said mass into tablet form, said separate gas-forming ingredients interacting to a substantially limited extent to form a small amount of gas in each tablet, and then removing said organic solvent from said tablets, said gas serving to form a substantial number of voids in the bodies of said tablets.
Claim 3
Independent Claim
150 words
A method of preparing effervescent molded triturate tablets which are rapidly disintegratable and soluble or dispersible in hot or cold aqueous media, which comprises triturating, in the presence of a limited amount of water, a mixture of pulverulent materials which includes a carbonate or bicarbonate and a carboxylic acid with a volatile organic solvent ingredient to form a moldable mass, at least one of the pulverulent materials being at least partially soluble in said organic solvent ingredient, said limited amount of water not exceeding 3% by weight of said volatile organic solvent, molding said mass into tablet form, said carbonate or bicarbonate and carboxylic acid interacting to a substantially limited extent to form a small amount of carbon dioxide gas in each tablet, and then removing said organic solvent from said tablets, said carbon dioxide gas serving to form a substantial number of voids in the bodies of said tablets.
Claim 4
Independent Claim
150 words
A method of preparing effervescent molded triturate tablets which are rapidly disintegratable and soluble or dispersible in hot or cold aqueous media, which comprises triturating, in the presence of a limited amount of water, a mixture of pulverulent materials which includes a carbonate or bicarbonate and a carboxylic acid with a volatile organic solvent ingredient to form a moldable mass, at least one of the pulverulent materials being at least partially soluble in said organic solvent ingredient, said limited amount of water not exceeding 3% by weight of said volatile organic solvent, molding said mass into tablet form, said carbonate or bicarbonate and carboxylic acid interacting to a substantially limited extent to form a small amount of carbon dioxide gas in each tablet, and then removing said organic solvent from said tablets, said carbon dioxide gas serving to form a substantial number of voids in the bodies of said tablets.
Claim 5
Dependent Claim
21 words
A method according to claim 2, wherein the carbonate or bicarbonate is sodium bicarbonate and the carboxylic acid is citric acid.
Claim 6
Dependent Claim
22 words
A method according to claim 3, wherein there is included in said mixture of pulverulent materials a water-soluble synthetic non-toxic sweetening agent.
Claim 7
Dependent Claim
31 words
A method according to claim 4, wherein said sweetening agent is at least one member of the group of saccharine and non-toxic water-soluble salts thereof, and aspartyl dipeptide lower alkyl esters.
Claim 8
Dependent Claim
22 words
A method according to claim 2, wherein the organic solvent comprises at least one of the group of ethanol, 2-propanol, and acetone.
Claim 9
Dependent Claim
22 words
A method according to claim 2, wherein the percentage of voids in the tablets is in the range of 15% to 35%.
Claim 10
Dependent Claim
28 words
An effervescent molded triturate tablet which is rapidly disintegratable and soluble or dispersible in hot or cold aqueous media produced in accordance with the method of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |