US4183614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope slide
Assignee: DoltHub Inc
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Filing: 1977-01-10
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Granted: 1980-01-15
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Expires: 1997-01-10
Abstract
Abstract A microscope slide and method of making same, providing on a substantially transparent substrate, an extremely closely spaced grid pattern of a film less transparent than the substrate, with the pattern produced by photochemical etching, and with the film typically an iridized metal oxide film.
Inventors
- 👤 Bernard Feldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:27
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/34; B; B01; B01J; B01J2219/00; B01J2219/00274; B01J2219/00277; B01J2219/0054; B01J2219/00542; B01J2219/00583; B01J2219/00603; B01J2219/00659; C; C40; C40B; C40B70/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
A microscope slide comprising a substrate of substantially transparent material having on one face thereof a film of a thickness in the range of 500-10,000 angstroms and less transparent than said substrate, with said film having a grid pattern resulting from the removal of predetermined portions of said film by photochemical etching whereby the grid pattern is at the focussing surface of the substrate when a specimen is on the substrate.
Claim 2
Dependent Claim
71 words
A microscope slide comprising a substrate of substantially transparent material having on one face thereof a film of a thickness in the range of 500-10,000 angstroms and less transparent than said substrate, with said film having a grid pattern resulting from the removal of predetermined portions of said film by photochemical etching whereby the grid pattern is at the focussing surface of the substrate when a specimen is on the substrate.
Claim 3
Dependent Claim
19 words
A slide as defined in claim 1 wherein said pattern has lines spaced not less than five per millimeter.
Claim 4
Dependent Claim
19 words
A slide as defined in claim 1 wherein said pattern has lines spaced not less than twenty-five per millimeter.
Claim 5
Dependent Claim
21 words
A slide as defined in claim 1 wherein said film is an iridized metal oxide film of a thickness 1000-5000 angstroms.
Claim 6
Dependent Claim
18 words
A slide as defined in claim 1 wherein said substrate is substantially colorless and said film is colored.
Claim 7
Dependent Claim
26 words
A slide as defined in claim 1 wherein said film is divided into a plurality of zones and each zone includes an indicia identifying the zone.
Claim 8
Independent Claim
111 words
A method of making a microscope slide, including the steps of: applying onto a face of a substantially transparent substrate, a film of a thickness in the range of 500-10,000 angstroms and less transparent than the substrate; applying a layer of photo sensitive material over said film; exposing said layer through a mask; developing said layer to provide a grid pattern of the layer; and etching a grid pattern in said film through the removed portions of said layer, providing a thin relatively transparent grid pattern of the film on said substrate whereby the grid pattern is at the focussing surface of the substrate when a specimen is on the substrate.
Claim 9
Independent Claim
111 words
A method of making a microscope slide, including the steps of: applying onto a face of a substantially transparent substrate, a film of a thickness in the range of 500-10,000 angstroms and less transparent than the substrate; applying a layer of photo sensitive material over said film; exposing said layer through a mask; developing said layer to provide a grid pattern of the layer; and etching a grid pattern in said film through the removed portions of said layer, providing a thin relatively transparent grid pattern of the film on said substrate whereby the grid pattern is at the focussing surface of the substrate when a specimen is on the substrate.
Claim 10
Dependent Claim
18 words
The method of claim 7 including etching parallel lines in groups of not less than five per millimeter.
Claim 11
Dependent Claim
18 words
The method of claim 7 including etching parallel lines in groups of not less than twenty-five per millimeter.
Claim 12
Dependent Claim
18 words
The method of claim 7 including applying an iridized metal oxide film of a thickness about 1,000-5,000 angstroms.
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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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |