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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 |
| 4857336 |
Oral therapeutic system having systemic action |
Aug. 15, 1989 |
| 4855143 |
Method of preparing controlled long-acting pharmaceutical formulations in unit dosage form having uniform and comparable bioavailability characteristics |
Aug. 8, 1989 |
| 4851233 |
Sustained release formulations |
Jul. 25, 1989 |
| 4851232 |
Drug delivery system with means for obtaining desirable in vivo release rate pattern |
Jul. 25, 1989 |
| 4851231 |
System for delivering drug in selected environment of use |
Jul. 25, 1989 |
| 4842866 |
Slow release solid preparation |
Jun. 27, 1989 |
| 4837030 |
Novel controlled release formulations of tetracycline compounds |
Jun. 6, 1989 |
| 4837032 |
Theophylline sustained release tablet |
Jun. 6, 1989 |
| 4834984 |
Controlled release dihydrocodeine composition |
May. 30, 1989 |
| 4834985 |
Controlled release pharmaceutical composition |
May. 30, 1989 |
| 4832994 |
Anti-smoking oral composition |
May. 23, 1989 |
| 4832957 |
Controlled release combination of carbidopa/levodopa |
May. 23, 1989 |
| 4826688 |
Controlled absorption pharmaceutical formulation |
May. 2, 1989 |
| 4820522 |
Oral sustained release acetaminophen formulation and process |
Apr. 11, 1989 |
| 4820523 |
Pharmaceutical composition |
Apr. 11, 1989 |
| 4816177 |
Treating agent for liquid media |
Mar. 28, 1989 |
| 4814179 |
Floating sustained release therapeutic compositions |
Mar. 21, 1989 |
| 4814178 |
Floating sustained release therapeutic compositions |
Mar. 21, 1989 |
| 4814176 |
Sustained release preparation |
Mar. 21, 1989 |
| 4810501 |
Sustained release pharmaceutical preparations |
Mar. 7, 1989 |
| 4808413 |
Pharmaceutical compositions in the form of beadlets and method |
Feb. 28, 1989 |
| 4806337 |
Erodible matrix for sustained release bioactive composition |
Feb. 21, 1989 |
| 4804540 |
Process for preparing the combination products of triamterene and hydrochlorothiazide |
Feb. 14, 1989 |
| 4803079 |
Controlled release naproxen and naproxen sodium tablets |
Feb. 7, 1989 |
| 4784858 |
Controlled release tablet |
Nov. 15, 1988 |
| 4783337 |
Osmotic system comprising plurality of members for dispensing drug |
Nov. 8, 1988 |
| 4781858 |
Cyclodextrin-silica composite and a method for the preparation thereof |
Nov. 1, 1988 |
| 4780318 |
Oral pharmaceutical composition |
Oct. 25, 1988 |
| 4775749 |
Inclusion compound of eicosapentaenoic of acid and food product containing the same |
Oct. 4, 1988 |
| 4775535 |
Method of preparing controlled long-acting pharmaceutical formulations in unit dosage form having uniform and comparable bioavailability characteristics |
Oct. 4, 1988 |
| 4772475 |
Controlled-release multiple units pharmaceutical formulation |
Sep. 20, 1988 |
| 4764380 |
Drug delivery system comprising a volume increasing matrix containing a plurality of tiny pills |
Aug. 16, 1988 |
| 4756911 |
Controlled release formulation |
Jul. 12, 1988 |
| 4755180 |
Dosage form comprising solubility regulating member |
Jul. 5, 1988 |
| 4753801 |
Sustained release tablets |
Jun. 28, 1988 |
| 4752479 |
Multi vitamin and mineral dietary supplement with controlled release bioavailable iron |
Jun. 21, 1988 |
| 4748023 |
Process for the preparation of sustained release pharmaceutical compositions having a high active ingredient content |
May. 31, 1988 |
| 4738848 |
Anti-inflammatory analgesic adhesive preparation |
Apr. 19, 1988 |
| 4734285 |
Sustained release compositions |
Mar. 29, 1988 |
| 4717568 |
Laminar arrangement for increasing delivery of beneficial agent from dispenser |
Jan. 5, 1988 |
| 4716041 |
Diffusion coated multiple-units dosage form |
Dec. 29, 1987 |
| 4713248 |
Diffusion coated multiple-units dosage form |
Dec. 15, 1987 |
| 4710384 |
Sustained release tablets made from microcapsules |
Dec. 1, 1987 |
| 4704284 |
Long-acting matrix tablet formulations |
Nov. 3, 1987 |
| 4698264 |
Particulate composition and process for making same |
Oct. 6, 1987 |
| 4695467 |
Sustained release tablet |
Sep. 22, 1987 |
| 4693895 |
Colon delivery system |
Sep. 15, 1987 |
| 4692337 |
Sustained release pharmaceutical tablet of theophylline and production process thereof |
Sep. 8, 1987 |
| 4692336 |
Self controlled release device for administering beneficial agent to recipient |
Sep. 8, 1987 |
| 4690824 |
Solid pharmaceutical formulations for slow, zero order release via controlled surface erosion: expanded range |
Sep. 1, 1987 |
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