Patent US4521520A successfully refreshed from Google Patents.
US4521520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for in house occult blood testing
Assignee: SmithKline Diagnostics Inc
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Filing: 1983-04-07
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Granted: 1985-06-04
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Expires: 2003-04-07
Abstract
Abstract A method for determining the presence of occult blood in the bowl of a toilet includes the steps of suspending from the seat of the toilet an absorbent test sheet carrying a test reagent, defecating onto said sheet, flipping said sheet over to deposit the fecal matter in the bowl water, applying a developing solution to said sheet and observing whether a portion of said sheet is dyed blue. Preferably the test sheet is an absorbent paper printed or impregnated with guaiac.
Inventors
- 👤 Stanley E. Jacke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:07
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/72; G01N33/721; G01N33/726; A; A61; A61B; A61B10/00; A61B10/0038
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
A method for determining the presence of occult blood in fecal matter which comprises: suspending, via a multi-support suspension device, an absorbent test sheet from a seat of a toilet for the reception of fecal matter, said multi-support suspension device being configured to permit on-site rotation of said test sheet upon removal of one of said supports and said sheet carrying a test reagent; defecating onto said test sheet; removing one of said supports and flipping said sheet over and exposing the underside of said sheet; applying a developing solution to a portion of the underside of said sheet; and observing whether a portion of said sheet is dyed blue.
Claim 2
Independent Claim
110 words
A method for determining the presence of occult blood in fecal matter which comprises: suspending, via a multi-support suspension device, an absorbent test sheet from a seat of a toilet for the reception of fecal matter, said multi-support suspension device being configured to permit on-site rotation of said test sheet upon removal of one of said supports and said sheet carrying a test reagent; defecating onto said test sheet; removing one of said supports and flipping said sheet over and exposing the underside of said sheet; applying a developing solution to a portion of the underside of said sheet; and observing whether a portion of said sheet is dyed blue.
Claim 3
Dependent Claim
11 words
The method of claim 1 in which the reagent is guaiac.
Claim 4
Dependent Claim
13 words
The method of claim 1 in which said sheet is an absorbent paper.
Claim 5
Dependent Claim
14 words
The method of claim 1 in which said developing solution is a peroxide solution.
Claim 6
Dependent Claim
18 words
The method of claim 1 in which said sheet has openings therethrough to permit drainage of excess fluid.
Claim 7
Independent Claim
120 words
A method for determining the presence of occult blood in fecal matter which comprises: suspending, via a multi-support suspensing device, an absorbent test sheet from a seat of a toilet for the reception of fecal matter, said multi-support suspension device being configured to permit on-site rotation of said test sheet upon removal of one of said supports and said sheet carrying a test reagent and a hydroperoxide in dry form; defecating onto said sheet; removing one of said supports and flipping said sheet over to deposit the fecal matter in the bowl water and expose the underside of said sheet; observing whether a portion of said sheet is dyed blue; and releasing said sheet from the toilet bowl and flushing.
Claim 8
Independent Claim
120 words
A method for determining the presence of occult blood in fecal matter which comprises: suspending, via a multi-support suspensing device, an absorbent test sheet from a seat of a toilet for the reception of fecal matter, said multi-support suspension device being configured to permit on-site rotation of said test sheet upon removal of one of said supports and said sheet carrying a test reagent and a hydroperoxide in dry form; defecating onto said sheet; removing one of said supports and flipping said sheet over to deposit the fecal matter in the bowl water and expose the underside of said sheet; observing whether a portion of said sheet is dyed blue; and releasing said sheet from the toilet bowl and flushing.
Claim 9
Dependent Claim
18 words
The method of claim 6 in which said sheet has openings therethrough to permit drainage of excess fluid.
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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) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |