[Federal Register Volume 59, Number 24 (Friday, February 4, 1994)] [Unknown Section] [Page 0] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 94-2530] [[Page Unknown]] [Federal Register: February 4, 1994] ----------------------------------------------------------------------- NATIONAL AERONAUTICS AND SPACE ADMINISTRATION [Notice 94-008] Invention Available for Licensing AGENCY: National Aeronautics and Space Administration. ACTION: Notice of availability for licensing. ----------------------------------------------------------------------- SUMMARY: The invention listed below is owned by an agency of the U.S. Government and is available for licensing in the U.S. in accordance with 35 U.S.C. 207 to achieve expeditious commercialization of results of federally funded research and development. U.S. Patent Application Number 08/153,930, filed November 15, 1993, and entitled ``Method and Apparatus To Characterize Ultrasonically Reflective Contrast Agents''--The present invention relates in general to a method and apparatus for characterizing the time and frequency response of ultrasonically reflective contrast agents. The present invention is a method and apparatus for characterizing the time and frequency response of an ultrasonically reflective contrast agent. An ultrasonically reflective contrast agent is injected, under constant pressure, into a fluid flowing through a pump flow circuit. The fluid and the ultrasonically reflective contrast agent are uniformly mixed in a mixing chamber, and the uniform mixture is passed through a contrast agent chamber. The contrast agent chamber is acoustically and axially interposed between an ultrasonic transducer chamber and an acoustic isolation chamber. A pulse of ultrasonic energy is transmitted into the contrast agent chamber from the ultrasonic transducer chamber. An echo waveform is received from the ultrasonically reflective contrast agent, and it is analyzed to determine the time and frequency response of the ultrasonically reflective contrast agent. The invention claimed in this patent application is available for licensing on an exclusive, partially exclusive or nonexclusive basis for upfront, running and annual minimum royalty payments to a partner committed to commercializing this technology. ADDRESSES: Licensing information and a copy of the U.S. Patent Application (without the claims) may be obtained by writing to Kimberly A. Chasteen at the Office of Patent Counsel, Mail Stop 143, NASA Langley Research Center, Hampton, VA 23681-0001 (telephone (804) 864- 3227, fax (804) 864-8298). Please note the case number, LAR-14,969-1, when requesting information. Dated: January 28, 1994. Edward A. Frankle, General Counsel. [FR Doc. 94-2530 Filed 2-3-94; 8:45 am] BILLING CODE 7510-01-M