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Class Information
Number: 424/469
Name: Drug, bio-affecting and body treating compositions > Preparations characterized by special physical form > Tablets, lozenges, or pills > Sustained or differential release type > Discrete particles in supporting matrix
Description: Subject matter in which discrete soluble particles of the active ingredient are positioned or dispersed in a solid, generally insoluble matrix from which said particles are leached sequentially under conditions of use from the outside portions of the matrix inwardly.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4684516 |
Sustained release tablets and method of making same |
Aug. 4, 1987 |
| 4684524 |
Rate controlled dispenser for administering beneficial agent |
Aug. 4, 1987 |
| 4673527 |
Tablet granulation |
Jun. 16, 1987 |
| 4668517 |
Furazolidone dosage form |
May. 26, 1987 |
| 4649043 |
Drug delivery system for delivering a plurality of tiny pills in the gastrointestinal tract |
Mar. 10, 1987 |
| 4606909 |
Pharmaceutical multiple-units formulation |
Aug. 19, 1986 |
| 4590062 |
Dry direct compression compositions for controlled release dosage forms |
May. 20, 1986 |
| 4571333 |
Controlled release naproxen and naproxen sodium tablets |
Feb. 18, 1986 |
| 4461759 |
Constant release rate solid oral dosage formulations of veropamil |
Jul. 24, 1984 |
| 4434153 |
Drug delivery system comprising a reservoir containing a plurality of tiny pills |
Feb. 28, 1984 |
| 4415547 |
Sustained-release pharmaceutical tablet and process for preparation thereof |
Nov. 15, 1983 |
| 4389393 |
Sustained release therapeutic compositions based on high molecular weight hydroxypropylmethylcellulose |
Jun. 21, 1983 |
| 4367217 |
Dipyricamole sustained release forms comprising lacquer-coated particles and the preparation thereof |
Jan. 4, 1983 |
| 4308251 |
Controlled release formulations of orally-active medicaments |
Dec. 29, 1981 |
| 4264573 |
Pharmaceutical formulation for slow release via controlled surface erosion |
Apr. 28, 1981 |
| 4259314 |
Method and composition for the preparation of controlled long-acting pharmaceuticals |
Mar. 31, 1981 |
| 4254099 |
Pharmaceutical tablet composition |
Mar. 3, 1981 |
| 4226849 |
Sustained release therapeutic compositions |
Oct. 7, 1980 |
| 4083949 |
New oral form of medicament and a method for producing it |
Apr. 11, 1978 |
| 4049791 |
Prolonged acting appetite suppressant and anti-obesity compositions containing amphetamine adipate, dextroamphetamine adipate, amphetamine sulfate and dextroamphetamine sulfate as the active |
Sep. 20, 1977 |
| 4044119 |
Method of controlling release of medicament and bolus therefor |
Aug. 23, 1977 |
| 4017598 |
Preparation of readily disintegrable tablets |
Apr. 12, 1977 |
| 4011061 |
Articles providing sustained release and method of making |
Mar. 8, 1977 |
| 3975513 |
Sustained-release tablet for prophylaxis against trace element deficiency diseases |
Aug. 17, 1976 |
| 3962414 |
Structured bioerodible drug delivery device |
Jun. 8, 1976 |
| 3959457 |
Microparticulate material and method of making such material |
May. 25, 1976 |
| 3951821 |
Disintegrating agent for tablets |
Apr. 20, 1976 |
| 3950508 |
Process for obtaining pharmaceutical sustained releases |
Apr. 13, 1976 |
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