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Referenced by

Citing PatentFiling dateIssue dateOriginal AssigneeTitle
US396801127 Mar 19756 Jul 1976Alza CorporationTest implement and test method for colorimetrically determining whether a female is fertile or pregnant
US455284121 Apr 198312 Nov 1985Shionogi & Co., Ltd.N-Acetyl-.beta.-D-glucosaminides for determining N-acetyl-.beta.-D-glucosaminidase activity
US495630016 Oct 198411 Sep 1990Helena Laboratories CorporationAid for determining the presence of occult blood, method of making the aid, and method of using the aid
US50810406 Jun 198914 Jan 1992Helena Laboratories CorporationComposition and kit for testing for occult blood in human and animal excretions, fluids, or tissue matrixes
US51961679 May 199123 Mar 1993Helena Laboratories CorporationFecal occult blood test product with positive and negative controls
US520031710 Jan 19926 Apr 1993Abbott LaboratoriesMethod and device for quantitative chromatography
US52178749 May 19918 Jun 1993Helena Laboratories CorporationFecal occult blood test product with positive and negative controls
US527388829 Apr 198828 Dec 1993Helena Laboratories CorporationChemical test kit and method for determining the presence of blood in a specimen and for verifying the effectiveness of the chemicals
US570291312 Jun 198930 Dec 1997Helena Laboratories CorporationChromgen-reagent test system
US600476912 Dec 199721 Dec 1999Merck Patent GesellschaftCompositions and procedures for the determination of hydrolytic enzymes