US4920045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of occult blood in feces
Assignee: Ikagaku Co Ltd
•
Filing: 1988-09-22
•
Granted: 1990-04-24
•
Expires: 2008-09-22
Abstract
Abstract A method for detection of occult blood in a fecal sample which comprises acting a glycosidase type bacteriolytic enzyme on the fecal sample and subjecting the resulting fecal sample to simultaneous detection of hemoglobin, preferably in combination with transferrin, by an immunological measurement procedure.
Inventors
- 👤 Shoji Okuda
- 👤 Kazuo Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:13
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/72; G01N33/721; G01N33/725; Y; Y10; Y10S; Y10S435/00; Y10S435/973; Y10S436/00; Y10S436/815; Y10S436/825; Y10T; Y10T436/00; Y10T436/25; Y10T436/25125; Y10T436/25375
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
47 words
A method for detection of occult blood in a fecal sample comprising simultaneously reacting said fecal sample with antibodies to hemoglobin and antibodies to transferrin and determining the presence of immunologic reaction products of said hemoglobin and transferrin as an indication of the presence of occult blood.
Claim 2
Independent Claim
47 words
A method for detection of occult blood in a fecal sample comprising simultaneously reacting said fecal sample with antibodies to hemoglobin and antibodies to transferrin and determining the presence of immunologic reaction products of said hemoglobin and transferrin as an indication of the presence of occult blood.
Claim 3
Dependent Claim
32 words
The method according to claim 1, wherein the fecal sample is admixed with a glycosidase capable of lysing bacterial cell walls without decomposing hemoglobin prior to the determination of hemoglobin and transferrin.
Claim 4
Dependent Claim
29 words
The method according to claim 1, wherein the fecal sample is sampled by the use of a spoon or spatula coated with anti-human hemoglobin antibody and anti-human transferrin antibody.
Claim 5
Dependent Claim
11 words
The method according to claim 2, wherein the enzyme is lysozyme.
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) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |