Patent US2429053A successfully refreshed from Google Patents.
EP0321043A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Controlled release bolus device
Assignee: Alza Corp
•
Filing: 1988-12-12
•
Granted: —
•
Expires: 2008-12-12
Abstract
Abstract This invention relates to an improved controlled release bolus device wherein the improvement comprises attaching at the orifice a screen or insert which prevents blockage of the orifice by exogeneous materials, but does not vary the flow of medicament from said device.
Inventors
- 👤 Joel R. Zingerman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:26
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0053; A61K9/0068
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
44 words
An improved controlled release bolus device comprising an osmotic agent, active agent, densifier, and orifice being surrounded by a membrane wherein the improvement comprises affixing a mesh screen or rigid film cross-orifice radial insert of from 2 to 6 radial sections into said orifice.
Claim 2
Dependent Claim
44 words
An improved controlled release bolus device comprising an osmotic agent, active agent, densifier, and orifice being surrounded by a membrane wherein the improvement comprises affixing a mesh screen or rigid film cross-orifice radial insert of from 2 to 6 radial sections into said orifice.
Claim 3
Dependent Claim
17 words
The device of Claim 1, having affixed a 0.030 to 0.050 mesh horizontal screen over said orifice.
Claim 4
Dependent Claim
13 words
The device of Claim 2, having a 40-mesh screen affixed across said orifice.
Claim 5
Dependent Claim
18 words
The device of Claim 1, having rigid film inserts extending substantially the length of the orifice affixed vertically.
Claim 6
Dependent Claim
19 words
The device of Claim 4, wherein the rigid film insert extends at least half the length of the orifice.
References Cited (Backward Citations)
GB2077103A
Cited
GB2155787A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.