Ultrasonic calibration material and method
US5196343A · kind A · utility
25Cited by
13References
9Claims
0Family size
Inventors
Key dates
| Filing date | Oct 4, 1990 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Oct 4, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Ultrasonic calibration material produced by polymerization of acrylamide with N,N'-methylene-bis-acrylamide in vacuum-degassed liquid solutions such as water, ethylene glycol, emulsions of non-miscible liquids with water and blends of liquids in which a homogeneous and permanent suspension of solid and liquid particles (e.g.: alumina, boron nitride, graphite, water-filled phenolic microspheres, glass microspheres, polyethylene, turpentine oil) is chemically achieved by polymerization of an acrylic acid polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.