US4329317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stabilizing a specimen slide for occult blood testing
Assignee: SmithKline Instrument Inc
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Filing: 1981-01-29
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Granted: 1982-05-11
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Expires: 2001-01-29
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
2026-11-07 14:44
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/72; G01N33/721; G01N33/726; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/2525
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
54 words
A method of stabilizing a specimen slide for occult blood testing having a guaiac treated specimen receiving sheet between a front panel and a rear panel with openings in the front and rear panels and pivotal covers to cover said openings which comprises applying a solution or suspension of 2,6-di-tert-butyl-p-cresol to said pivotal covers.
Claim 2
Independent Claim
54 words
A method of stabilizing a specimen slide for occult blood testing having a guaiac treated specimen receiving sheet between a front panel and a rear panel with openings in the front and rear panels and pivotal covers to cover said openings which comprises applying a solution or suspension of 2,6-di-tert-butyl-p-cresol to said pivotal covers.
Claim 3
Dependent Claim
20 words
The method of claim 1 in which the solution or suspension is applied to the inside cover of the slide.
Claim 4
Dependent Claim
16 words
The method of claim 1 in which the 2,6-di-tert-butyl-p-cresol is in a varnish solution or suspension.
Claim 5
Dependent Claim
15 words
The method of claim 1 in which the 2,6-di-tert-butyl-p-cresol is in a solution of acetone.
Claim 6
Dependent Claim
20 words
The method of claim 1 in which the 2,6-di-tert-butyl-p-cresol is present from about 2 to about 3 percent by weight.
Claim 7
Dependent Claim
15 words
The method of claim 1 in which the solution is printed on the pivotal covers.
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) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |