US4382064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Specimen slide for occult blood testing
Assignee: SmithKline Instrument Inc
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Filing: 1982-02-11
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Granted: 1983-05-03
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Expires: 2002-02-11
Abstract
Abstract Specimen test slides for occult blood having a receiving sheet between a front panel and a rear panel with openings in the front and rear panels and pivotal covers coated with 2,6-di-tert-butyl-p-cresol to cover said openings.
Inventors
- 👤 Michael B. Detweiler
- 👤 Paul J. Lawrence
- 👤 Charles W. Townsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:40
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/72; G01N33/721; G01N33/726
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
In a specimen test slide for occult blood having a front panel, a rear panel, said front panel having a plurality of openings, a specimen receiving sheet carrying a guaiac test reagent between the front and rear panels, pivotal covers in said front and rear panels opposite said openings, the improvement comprising: said pivotal covers being coated with a composition containing 2,6-di-tert-butyl-p-cresol.
Claim 2
Dependent Claim
62 words
In a specimen test slide for occult blood having a front panel, a rear panel, said front panel having a plurality of openings, a specimen receiving sheet carrying a guaiac test reagent between the front and rear panels, pivotal covers in said front and rear panels opposite said openings, the improvement comprising: said pivotal covers being coated with a composition containing 2,6-di-tert-butyl-p-cresol.
Claim 3
Dependent Claim
14 words
The slide of claim 1 wherein the inside cover of the slide is coated.
Claim 4
Dependent Claim
14 words
The slide of claim 2 wherein the composition is a varnish solution or suspension.
Claim 5
Dependent Claim
22 words
The slide of claim 3 wherein the 2,6-di-tert-butyl-p-cresol is present from about 2 to about 3 percent by weight in the composition.
References Cited (Backward Citations)
US3252762A
Cited
US3853471A
Cited
US3996006A
Cited
US4071321A
Cited
DE2716060C3
Cited
US4329317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |