US4398909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit dose applicator
Assignee: Merck and Co Inc
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Filing: 1981-12-31
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Granted: 1983-08-16
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Expires: 2001-12-31
Abstract
Abstract A unit dose applicator for liquid ophthalmic medicaments in solution or suspension has an elongated housing for the medicament; at one end of the housing there is an opening for at least partially emptying the contents of the housing; at the other end of the housing is a second opening; and the second opening is capped by a diaphragm-like seal having a sufficient displacement potential to exude only 1 to 4 drops of the medicament.
Inventors
- 👤 Joel B. Portnoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:33
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/0008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A unit dose applicator for the delivery of an ophthalmic medicament to the eye comprising an elongated housing having a first and second end; at the first end a nozzle having at the distal end thereof an opening, at the opposite end of the housing cap, said cap in sealing engagement with the opening and having sidewalls and an end wall, the sidewalls essentially in parallel alignment with the sidewalls of the housing at proximal end and said end wall spaced from the proximal end of the housing so that the end wall and sidewalls define a headspace, and the end wall deformable so that upon deformation inward toward the proximal end, said end wall intrudes into the headspace to displace from 1 to 6 drops from the distal end of the housing, and wherein the housing contains a medicament, said medicament adjacent the opening at the distal end and intermediate the medicament and opening at the proximal end of the housing is an impeller fluid that is inert to and immicible with the medicament.
Claim 2
Dependent Claim
175 words
A unit dose applicator for the delivery of an ophthalmic medicament to the eye comprising an elongated housing having a first and second end; at the first end a nozzle having at the distal end thereof an opening, at the opposite end of the housing cap, said cap in sealing engagement with the opening and having sidewalls and an end wall, the sidewalls essentially in parallel alignment with the sidewalls of the housing at proximal end and said end wall spaced from the proximal end of the housing so that the end wall and sidewalls define a headspace, and the end wall deformable so that upon deformation inward toward the proximal end, said end wall intrudes into the headspace to displace from 1 to 6 drops from the distal end of the housing, and wherein the housing contains a medicament, said medicament adjacent the opening at the distal end and intermediate the medicament and opening at the proximal end of the housing is an impeller fluid that is inert to and immicible with the medicament.
References Cited (Backward Citations)
US565480A
Cited
GB191022299A
Cited
US1644606A
Cited
US1960858A
Cited
CH355895A
Cited
US2965255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |