James P Yesinowski

6411208, Jun 25, 2002

Jun 5, 1997

08/869934

Michael L. Buess - Alexandria VA
Allen N. Garroway - Fort Washington MD
Joel B. Miller - Cheverly MD
James P. Yesinowski - Fort Washington MD
Roy P. Lindquist - Oakton VA

The United States of America as represented by the Secretary of the Navy - Washington DC

G08B 2100

340540, 324300, 324727

A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate the presence of the target material. The samples that have the piezoelectric resonance are then further screened by a different process to confirm the presence of the target material. For example, samples that have the piezoelectric resonance are further screened for a specific nuclear quadrupole resonance (NQR), a specific nuclear magnetic resonance (NMR) or a specific visual characteristic, to confirm the presence of the target material in the sample. The apparatus and method can be used, for example, to search luggage at ports of entry for the presence of cocaine hydrochloride or heroin hydrochloride.

6956476, Oct 18, 2005

Jun 5, 2002

10/166287

Michael L. Buess - Alexandria VA, US
Allen M. Garroway - Fort Washington MD, US
Joel B. Miller - Cheverly MD, US
James P. Yesinowski - Fort Washington MD, US
Roy P. Lindquist - Oakton VA, US

The United States of America as represented by the Secretary of the Navy - Washington DC

G08B021/00

340540, 324309

A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate the presence of the target material. The samples that have the piezoelectric resonance are then further screened by a different process to confirm the presence of the target material. For example, samples that have the piezoelectric resonance are further screened for a specific nuclear quadrupole resonance (NQR), a specific nuclear magnetic resonance (NMR) or a specific visual characteristic, to confirm the presence of the target material in the sample. The apparatus and method can be used, for example, to search luggage at ports of entry for the presence of cocaine hydrochloride or heroin hydrochloride.

7132942, Nov 7, 2006

Sep 14, 2005

11/229442

Michael L. Buess - Alexandria VA, US
Allen M. Garroway - Fort Washington MD, US
Joel B. Miller - Cheverly MD, US
James P. Yesinowski - Fort Washington MD, US
Roy P. Lindquist - Oakton VA, US

The United States of America as represented by the Secretary of the Navy - Washington DC

G08B 21/00

340540, 324300, 324727

A method and apparatus for screening samples to determine which samples include a target material. Generally, the samples are pre-screened to determine which of the samples have a piezoelectric resonance when irradiated with an electric field, to thereby indicate the presence of the target material. The samples that have the piezoelectric resonance are then further screened by a different process to confirm the presence of the target material. For example, samples that have the piezoelectric resonance are further screened for a specific nuclear quadrupole resonance (NQR), a specific nuclear magnetic resonance (NMR) or a specific visual characteristic, to confirm the presence of the target material in the sample. The apparatus and method can be used, for example, to search luggage at ports of entry for the presence of cocaine hydrochloride or heroin hydrochloride.

58865250, Mar 23, 1999

Mar 17, 1997

8/822138

James Paul Yesinowski - Fort Washington MD
Edward A. Hill - Alexandria VA

The United States of America as represented by the Secretary of the Navy - Washington DC

G01R 3348

324321

Nuclear magnetic resonance analysis of powdery or other randomly oriented solid samples is improved by slowly rotating the sample with a period exceeding the nuclear spin relaxation time of nuclei in the sample. As a result, a relatively large proportion of the crystallites in the sample are brought into resonance, thereby improving the signal to noise ratio of the NMR reading. In addition, information about the width of the entire spectrum can be obtained from analysis of measurements of only a portion of it.

53651715, Nov 15, 1994

Nov 30, 1992

7/983990

Michael L. Buess - Alexandria VA
Allen N. Garroway - Fort Washington MD
James P. Yesinowski - Fort Washington MD

The United States of America as represented by the Secretary of the Navy - Washington DC

G01R 3320

324307

Acoustic ringing and adverse effects from variations in the NQR detection of explosives and narcotics are minimized or eliminated. A specimen is irradiated with a modified steady state steady state free precession (SSFP) pulse sequence which combines a phase-alternated pulse sequence (PAPS) with a non-phase-alternated pulse sequence (NPAPS). The resulting signals from the PAPS and NPAS may then be coadded to cancel out the FID contributions to the signals. By canceling out the FID contributions to the signals, the effects of probe ringing and other extraneous responses, as well as the effect of temperature variation, are minimized or removed. The present method is especially effective in the detection of explosives and narcotics having. sup. 14 N or. sup. 35,37 Cl nuclei. A steady state free precession pulse which is especially useful with the method of the present invention is the strong off-resonance comb (SORC).