US3963025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ocular drug delivery device
Assignee: Alza Corp
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Filing: 1975-06-02
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Granted: 1976-06-15
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Expires: 1995-06-02
Abstract
Abstract Ocular drug delivery device comprising a bioerodible body of polymeric material sized and shaped for insertion in either conjunctival cul-de-sac that have improved retention in the eye. The devices have a stiffness and resistivity to bending manifested by a centroidal unsupported bending angle of less than 40°, preferably less than 20°, during the drug dispensing lifetime of the device.
Inventors
- 👤 Gordon W. Whitaker
- 👤 Yigal Gad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:14
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0048; A61K9/0051; A61F; A61F9/00; A61F9/0008; A61F9/0017
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
In a sustained release ocular drug delivery device comprising a flexible body that is formed of a bioerodible polymeric material, sized and shaped for insertion in either cul-de-sac of the eye, and contains a drug, the improvement wherein the body has a stiffness and resistivity to bending manifested by a centroidal unsupported bending angle of less than 40° during its drug dispensing lifetime.
Claim 2
Dependent Claim
63 words
In a sustained release ocular drug delivery device comprising a flexible body that is formed of a bioerodible polymeric material, sized and shaped for insertion in either cul-de-sac of the eye, and contains a drug, the improvement wherein the body has a stiffness and resistivity to bending manifested by a centroidal unsupported bending angle of less than 40° during its drug dispensing lifetime.
Claim 3
Dependent Claim
20 words
The improvement of claim 1 wherein the centroidal unsupported bending angle is less than 20° during said drug dispensing lifetime.
Claim 4
Dependent Claim
12 words
The improvement of claim 1 wherein said polymeric material is cross-linked gelatin.
Claim 5
Dependent Claim
28 words
The improvement of claim 1 wherein said body is 3 - 20 mm in length, 1 - 9 mm in width and 0.05 - 1 mm in thickness.
Claim 6
Dependent Claim
16 words
The improvement of claim 1 wherein the drug dispensing lifetime is in excess of one-half day.
Claim 7
Dependent Claim
15 words
The improvement of claim 1 wherein the drug dispensing lifetime is at least one day.
Claim 8
Dependent Claim
38 words
The improvement of claim 1 wherein the body is 3 - 20 mm in length, 1 - 9 mm in width and 0.05 - 1 mm in thickness and the drug dispensing lifetime is at least one day.
Claim 9
Dependent Claim
12 words
The improvement of claim 7 wherein the polymeric material is cross-linked gelatin.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |