Invention Grant
- Patent Title: Chemical indicator compositions, indicators and methods
- Patent Title (中): 化学指标组成，指标和方法
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Application No.: US13161079Application Date: 2011-06-15
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Publication No.: US09176103B2Publication Date: 2015-11-03
- Inventor: David A. Whitman , David M. Read , Ranjani V. Parthasarathy , Kevin D. Landgrebe , Anthony E. Bennett
- Applicant: David A. Whitman , David M. Read , Ranjani V. Parthasarathy , Kevin D. Landgrebe , Anthony E. Bennett
- Applicant Address: US MN St. Paul
- Assignee: 3M Innovative Properties Company
- Current Assignee: 3M Innovative Properties Company
- Current Assignee Address: US MN St. Paul
- Main IPC: G01N21/78
- IPC: G01N21/78 ; G01N31/22
Abstract:
Chemical indicator compositions comprising a bismuth compound; elemental sulfur; and a compound with relatively high water solubility which makes the composition alkaline when exposed to water vapor at an elevated temperature; a chemical indicator comprising a substrate and the composition coated on at least a portion of a major surface of the substrate; and methods of making and using the chemical indicator are disclosed.
Public/Granted literature
- US20110312096A1 CHEMICAL INDICATOR COMPOSITIONS, INDICATORS AND METHODS Public/Granted day:2011-12-22
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