US4503031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Super-fast-starting-sustained release tablet
Assignee: Individual
•
Filing: 1984-03-12
•
Granted: 1985-03-05
•
Expires: 2004-03-12
Abstract
Abstract A super-fast-starting, slow release medicinal tablet, wherein the tablet is comprised of two layers of compressed matrix that are fused together by means of a readily dissolvable adhesive substance, and in which one of the layers is a lightly compressed top layer containing a pure unadulterated, uncoated, active drug and which has one or more radial grooves in it's top surface to enhance rapid breakdown of the tablet; and the other layer has a strongly compressed portion comprised of a medically inert or inactive matrix having embedded throughout a multitude of pellets, each containing an active ingredient and having enteric coatings of various thicknesses so as to variably delay disintegration of the pellets.
Inventors
- 👤 Jacob A. Glassman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:43
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2072; A61K9/2086; A61K9/209; A61K9/0002; A61K9/0007
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
(a) A medically active tablet including top and bottom layers of compressed medically inert granular-like matrix material, (b) a number of pure unadulterated pellets of active medicament embedded in the matrix material of the bottom layer (c) an enteric coating on each of said pellets resistant to stomach juices, (d) the matrix material of the said bottom layer being strongly compressed to resist rapid release of the pellets, (e) said top layer being lightly compressed, a quantity of pure unadulterated uncoated pellets of active medicament embedded in the matrix material of the top layer, (f) at least one groove in the said top layer dividing it into segments, and (g) a midlayer including an effervescent mixture of a bicarbonate and an acid arranged between said two layers, (h) said midlayer securing said two layers together and being subject to rapid dissolution by fluid and stomach juices to separate the segments from the bottom layer and obtain quick dissolution and immediate absorption of the active drug in said segments and a super-fast therapeutic start.
Claim 2
Dependent Claim
173 words
(a) A medically active tablet including top and bottom layers of compressed medically inert granular-like matrix material, (b) a number of pure unadulterated pellets of active medicament embedded in the matrix material of the bottom layer (c) an enteric coating on each of said pellets resistant to stomach juices, (d) the matrix material of the said bottom layer being strongly compressed to resist rapid release of the pellets, (e) said top layer being lightly compressed, a quantity of pure unadulterated uncoated pellets of active medicament embedded in the matrix material of the top layer, (f) at least one groove in the said top layer dividing it into segments, and (g) a midlayer including an effervescent mixture of a bicarbonate and an acid arranged between said two layers, (h) said midlayer securing said two layers together and being subject to rapid dissolution by fluid and stomach juices to separate the segments from the bottom layer and obtain quick dissolution and immediate absorption of the active drug in said segments and a super-fast therapeutic start.
Claim 3
Dependent Claim
23 words
The tablet recited in claim 1, wherein release lift-off of the top layer segments enhances rapid fragmentation and dissolution of the top layer.
Claim 4
Dependent Claim
26 words
The tablet recited in claim 1, wherein there are several deep grooves in the top layer dividing it into independent segments down to the bottom layer.
Claim 5
Dependent Claim
23 words
The tablet recited in claim 1, wherein the lightly compressed top layer includes a proportioned effervescent mixture of sodium bicarbonate and an acid.
Claim 6
Dependent Claim
30 words
The tablet recited in claim 1, wherein the lightly compressed mid-layer includes a desired and proportioned mixture of sodium bicarbonate and citric acid which upon being moistened liberates carbon dioxide.
Claim 7
Dependent Claim
44 words
The tablet recited in claim 1, wherein there are a multitude of deep-cut grooves in the top layer dividing said layer into a multitude of segments to hasten their separation from the bottom layer and increase the rate of drug absorption and therapeutic action.
Claim 8
Dependent Claim
155 words
A medically active tablet consisting of an upper and a lower layer of compressed medicinally inert granular like matrix material, the lower layer having a number of enteric-coated medicinal pellets embedded therein, said lower layer being strongly compressed to resist rapid release of the medicaments therein, the upper layer including a quantity of pure unadulterated crystalline and micro-crystalline active medicaments admixed with an effervescent mixture to assist quicker dissolution of the upper layer embedded in the matrix material of said upper layer, said top layer being lightly compressed to allow for early disassociation from the bottom layer and rapid dissolution of the medicaments contained therein, a mid-layer arranged between the said two layers, said mid-layer including medicinally inert granular-like matrix material and an effervescent mixture of a bicarbonate and an acid to assist separation and disintegration of the top layer and quicker absorption of the active drug, thus resulting in a much faster therepeutic start.
Claim 9
Dependent Claim
155 words
A medically active tablet consisting of an upper and a lower layer of compressed medicinally inert granular like matrix material, the lower layer having a number of enteric-coated medicinal pellets embedded therein, said lower layer being strongly compressed to resist rapid release of the medicaments therein, the upper layer including a quantity of pure unadulterated crystalline and micro-crystalline active medicaments admixed with an effervescent mixture to assist quicker dissolution of the upper layer embedded in the matrix material of said upper layer, said top layer being lightly compressed to allow for early disassociation from the bottom layer and rapid dissolution of the medicaments contained therein, a mid-layer arranged between the said two layers, said mid-layer including medicinally inert granular-like matrix material and an effervescent mixture of a bicarbonate and an acid to assist separation and disintegration of the top layer and quicker absorption of the active drug, thus resulting in a much faster therepeutic start.
Claim 10
Dependent Claim
41 words
The tablet recited in claim 7, wherein the upper surface of the top layer is grooved with at least one diametrical groove scored deep enough to penetrate the top layer to aid it's breaking up and disassociation from the bottom layer.
Claim 11
Dependent Claim
33 words
The tablet recited in claim 7, wherein the top surface of the tablet is multiply grooved with diametrically arranged depressions scored deep enough to extend through the mid-layer and into the bottom layer.
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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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |