Patent US3092275A successfully refreshed from Google Patents.
Patent US3961346A successfully refreshed from Google Patents.
US3961346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid inspection slide
Assignee: NUNC INCORPORATED A DE CORP
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Filing: 1975-01-30
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Granted: 1976-06-01
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Expires: 1995-01-30
Abstract
Abstract Transparent organoplastic apparatus is described having at least one capillary chamber formed therein communicating with an outer edge of the apparatus. This chamber has a flat bottom wall and a flat upper wall forming the capillary chamber therebetween. The upper wall has an outer edge extending inwardly in a concave fashion from the outer edge of the apparatus, exposing the portion of the bottom wall between the outer edge of the upper wall and the outer edge of the apparatus. Liquid to be inspected is placed on this exposed portion of the bottom wall at the concave outer edge of the upper wall, and capillary action draws such liquid into the capillary chamber where it can be microscopically examined.
Inventors
- 👤 Fred K. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:48
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/34; B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5085; B01L2200/00; B01L2200/06; B01L2200/0642; B01L2300/00; B01L2300/08; B01L2300/0809; B01L2300/0822; B01L2400/00; B01L2400/04; B01L2400/0403; B01L2400/0406
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
A liquid inspection apparatus comprising a transparent organoplastic slide having an outer edge portion and having at least one capillary examination chamber formed therein and extending inwardly from said outer edge portion, said chamber having a flat bottom wall surface and having a flat upper wall surface formed on the underside of a thin flat upper wall portion, said upper and bottom wall surfaces extending at a slight acute angle from one another to form the capillary chamber therebetween, said upper wall portion being cut away adjacent said slide outer edge portion to define an outer edge of said upper wall portion extending inwardly in a concave fashion from the outer edge portion of said organoplastic slide.
Claim 2
Dependent Claim
117 words
A liquid inspection apparatus comprising a transparent organoplastic slide having an outer edge portion and having at least one capillary examination chamber formed therein and extending inwardly from said outer edge portion, said chamber having a flat bottom wall surface and having a flat upper wall surface formed on the underside of a thin flat upper wall portion, said upper and bottom wall surfaces extending at a slight acute angle from one another to form the capillary chamber therebetween, said upper wall portion being cut away adjacent said slide outer edge portion to define an outer edge of said upper wall portion extending inwardly in a concave fashion from the outer edge portion of said organoplastic slide.
Claim 3
Dependent Claim
32 words
A liquid inspection apparatus according to claim 1 having a plurality of capillary examination chambers therein, each of said plurality of chambers having the same configuration as the chamber of claim 1.
Claim 4
Dependent Claim
39 words
A liquid inspection apparatus according to claim 1 wherein at least one groove is formed in the bottom wall of the capillary chamber and extends from the outer edge of the slide inwardly toward the rear of the chamber.
Claim 5
Dependent Claim
37 words
A liquid inspection apparatus according to claim 3 wherein the groove is tapered so as to have its maximum depth at the outer edge of the slide and its minimum depth at the rear of the chamber.
Claim 6
Dependent Claim
42 words
A liquid inspection apparatus according to claim 1 wherein the capillary chamber has a generally rectangular shape with two opposing planar sidewalls and a straight rear wall, the sidewalls having a slight inward curvature at the junction thereof with the rear wall.
Claim 7
Dependent Claim
76 words
A liquid inspection apparatus according to claim 5 wherein at least one groove is formed in the bottom wall of the capillary chamber adjacent a sidewall of the chamber, said at least one groove extending from the outer edge of the slide inwardly toward the rear of the chamber and being tapered so as to have its maximum depth at the outer edge of the slide and its minimum depth at the rear of the chamber.
Claim 8
Dependent Claim
25 words
A liquid inspection apparatus according to claim 6 wherein there is one of said grooves extending along the base of each of said chamber sidewalls.
Claim 9
Dependent Claim
25 words
A liquid inspection apparatus according to claim 7 wherein the upper wall of the capillary chamber extends over substantially the entire length of each groove.
Claim 10
Dependent Claim
35 words
A liquid inspection apparatus according to claim 1 wherein said apparatus is provided with means defining a target surface which extends upwardly from the concave outer edge of the upper wall of the capillary chamber.
Claim 11
Dependent Claim
31 words
A liquid inspection apparatus according to claim 2 wherein the slide is capable of being frangibly separated into a plurality of individual segments each having at least one capillary chamber therein.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |