US4637693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope inspection slide
Assignee: ICL SCIENTIFIC Inc 11040 CONDOR AVENUE FOUNTAIN VALLEY CALIFORNIA 92708 A CORP OF DE
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Filing: 1985-07-23
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Granted: 1987-01-20
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Expires: 2005-07-23
Abstract
Abstract A microscope inspection slide including at least one examination chamber formed by bonding together a base plate and a cover plate. The base plate having a chamber floor surface raised above a deck surface on the base plate, and the cover plate having a roof surface with a depth control ridge positioned about a portion of the edge of the chamber roof surface. Bonding the cover plate to the base plate forms an examination chamber with the distance between the roof surface and floor surface maintained constant, and entrapped gases and excess fluid allowed to drain from the examination chamber through notches in the depth control ridge.
Inventors
- 👤 Vance C. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:59
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
241 words
A slide for use in the examination of liquid specimens, said slide comprising: a base plate having at least one flat examination chamber floor surface, said examination chamber floor surface being raised above an upper deck surface of said base plate; a cover plate having at least one flat examination chamber roof surface, said examination chamber roof surface being recessed from a lower surface of said cover plate and said examination roof surface having a smaller surface area over said examination chamber floor surface; a depth control ridge extending away from said examination chamber roof surface on all sides, but one, a sufficient distance to extend beyond the edge of said examination chamber floor surface so that positioning said examination chamber roof surface over said examination floor surface results in a fixed distance being determined by said depth control ridge between said examination chamber roof and floor surfaces, said depth control ridges having at least one notch extending between the examination chamber and the edge of said depth control ridge furthest from said examination chamber to provide for drainage onto said upper deck surface; bonding means extending from said cover plate so that positioning said cover plate on said base plate and bonding said cover plate to said upper deck surface affixes said cover plate to said base plate and also forms an essentially continuous bond between said base plate and said cover plate about the perimeter of each examination chamber.
Claim 2
Dependent Claim
241 words
A slide for use in the examination of liquid specimens, said slide comprising: a base plate having at least one flat examination chamber floor surface, said examination chamber floor surface being raised above an upper deck surface of said base plate; a cover plate having at least one flat examination chamber roof surface, said examination chamber roof surface being recessed from a lower surface of said cover plate and said examination roof surface having a smaller surface area over said examination chamber floor surface; a depth control ridge extending away from said examination chamber roof surface on all sides, but one, a sufficient distance to extend beyond the edge of said examination chamber floor surface so that positioning said examination chamber roof surface over said examination floor surface results in a fixed distance being determined by said depth control ridge between said examination chamber roof and floor surfaces, said depth control ridges having at least one notch extending between the examination chamber and the edge of said depth control ridge furthest from said examination chamber to provide for drainage onto said upper deck surface; bonding means extending from said cover plate so that positioning said cover plate on said base plate and bonding said cover plate to said upper deck surface affixes said cover plate to said base plate and also forms an essentially continuous bond between said base plate and said cover plate about the perimeter of each examination chamber.
Claim 3
Dependent Claim
240 words
A slide for use in the examination of liquid specimens, said slide comprising: a base plate having at least one flat examination chamber floor surface, said examination chamber floor surface being raised above an upper deck surface of said base plate; a cover plate having at least one flat examination chamber roof surface, said examination chamber roof surface being recessed from a lower surface of said cover plate and said examination chamber roof surface having a smaller surface area over said examination chamber floor surface; a depth control ridge extending away from said examination chamber roof on all sides, but one, a sufficient distance to extend beyond the edge of said examination chamber floor surface so that positioning said examination chamber roof surface over said examination floor surface results in a fixed distance being determined by said depth control ridge between said examination chamber roof and floor surfaces, said depth control ridge having at least one notch extending between the examination chamber and the edge of said depth control ridge furthest from said examination chamber to provide for drainage onto said upper deck surface; bonding menas extending from said base plate so that positionining said cover plate on said base plate and bonding said lower surface of said cover plate affixes said cover plate to said base plate and also forms an essentially continuous bond between said base plate and said cover plate about the perimeter of each examination chamber.
Claim 4
Dependent Claim
240 words
A slide for use in the examination of liquid specimens, said slide comprising: a base plate having at least one flat examination chamber floor surface, said examination chamber floor surface being raised above an upper deck surface of said base plate; a cover plate having at least one flat examination chamber roof surface, said examination chamber roof surface being recessed from a lower surface of said cover plate and said examination chamber roof surface having a smaller surface area over said examination chamber floor surface; a depth control ridge extending away from said examination chamber roof on all sides, but one, a sufficient distance to extend beyond the edge of said examination chamber floor surface so that positioning said examination chamber roof surface over said examination floor surface results in a fixed distance being determined by said depth control ridge between said examination chamber roof and floor surfaces, said depth control ridge having at least one notch extending between the examination chamber and the edge of said depth control ridge furthest from said examination chamber to provide for drainage onto said upper deck surface; bonding menas extending from said base plate so that positionining said cover plate on said base plate and bonding said lower surface of said cover plate affixes said cover plate to said base plate and also forms an essentially continuous bond between said base plate and said cover plate about the perimeter of each examination chamber.
Claim 5
Dependent Claim
22 words
A slide according to either claim 1 or 2 wherein said cover plate and said base plate are fabricated from transparent plastic.
Claim 6
Dependent Claim
28 words
A slide according to either claim 1 or 2 wherein said distance determined by said depth control ridge between said examination chamber roof and floor is 0.0045±0.0005 inches.
Claim 7
Dependent Claim
28 words
A slide according to either claim 1 or 2 wherein said distance determined by said depth control ridge between said examination chamber roof and floor is 0.010±0.001 inches.
Claim 8
Dependent Claim
70 words
A slide according to either claim 1 or 2 wherein for each examination chamber a ramp means intersects said examination chamber floor along one side of said examination chamber, said examination chamber roof overhangs said intersection, and at least one lip means extends between said examination chamber roof and said ramp means along a portion of the length of said intersection between said ramp means and said examination chamber floor.
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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) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |