Method for using very small particles as obscurants and taggants
US6989525B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 2003 |
| Grant date | Jan 24, 2006 |
| Priority date | — |
| Expiry date | Jan 21, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63G8/34
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method is disclosed wherein engineered particles are used as obscurants and taggants for vehicles. In some embodiments, the engineered particles are nano-crystals or micro-spheres (doped or un-doped). In some embodiments, the particles are engineered to re-radiate the energy that they receive at either the same wavelength or a different wavelength than that of the incident photons. Particles that scatter light at the same wavelength as the interrogating beam are advantageously used as taggants. Particles that scatter light at a different wavelength as the interrogating beam are advantageously used as obscurants. In some embodiments, the method comprises storing a quantity of particles in a first vehicle, and releasing a portion of the particles in an ambient environment of the first vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.