US4387972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope slide with confirming wells
Assignee: Immuno Concepts Inc
•
Filing: 1981-02-26
•
Granted: 1983-06-14
•
Expires: 2001-02-26
Abstract
Abstract A transparent microscope slide for the diagnostic analysis of liquid specimens, the slide having on one surface a plurality of specimen retaining areas defined by a first boundary forming a test well and a second boundary forming a channel outside the first boundary. The channel, or confirming well, acts as a moat by retaining specimen liquid overflowing from the test well, yet does not interfere with microscopic analysis. The well can have a circular or square configuration, and the channel can have a square or circular ring configuration and be concentric with the well. The size of the wells can vary depending upon the particular liquid specimen analyzed and the diagnostic procedure utilized without interfering with the efficacy of the confirming wells.
Inventors
- 👤 Donald W. Valencia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:49
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A microscope slide for use in diagnostic procedures of liquid specimens, said slide comprising a substantially flat base layer and a substantially flat overlay layer adhered thereto and having on one surface at least one structurally defined area for retaining liquid specimens during preparation for subsequent microscopic analysis, said area having a first boundary forming a well with a flat bottom defined by a surface of the base layer, and a second boundary forming a channel outside said first boundary, each of said boundaries being formed by the edges of openings through said overlay layer, whereby fluid spilled from said well during specimen preparation is retained in said channel.
Claim 2
Dependent Claim
109 words
A microscope slide for use in diagnostic procedures of liquid specimens, said slide comprising a substantially flat base layer and a substantially flat overlay layer adhered thereto and having on one surface at least one structurally defined area for retaining liquid specimens during preparation for subsequent microscopic analysis, said area having a first boundary forming a well with a flat bottom defined by a surface of the base layer, and a second boundary forming a channel outside said first boundary, each of said boundaries being formed by the edges of openings through said overlay layer, whereby fluid spilled from said well during specimen preparation is retained in said channel.
Claim 3
Dependent Claim
19 words
The microscope slide of claim 1 wherein said overlay layer is of a different material than said base layer.
Claim 4
Dependent Claim
16 words
The microscope slide of claim 1 wherein said overlay layer is thinner than said base layer.
Claim 5
Dependent Claim
18 words
The microscope slide of claim 1 wherein said first and second boundaries are concentric and have circular configurations.
Claim 6
Dependent Claim
12 words
The microscope slide of claim 1 wherein said overlay layer is opaque.
Claim 7
Dependent Claim
16 words
The microscope slide of claim 1 wherein a plurality of wells are present on the slide.
Claim 8
Dependent Claim
18 words
The microscope slide of claim 1 wherein said first boundary and said second boundary have a square configuration.
Claim 9
Dependent Claim
17 words
The microscope slide of claim 1 wherein the depths of the well and channel are substantially uniform.
Claim 10
Dependent Claim
32 words
The microscope slide of claim 1 wherein said slide is composed of glass and said first and second boundaries are defined by a silk screen imprint on a surface of the glass.
References Cited (Backward Citations)
US2041290A
Cited
US2302830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |