Marking

Patents tagged Marking

Sep 22, 2026

US12742621 - Non-lethal marking composition, projectile, and cartridge

A non-lethal marking projectile is disclosed. The marking projectile includes a frangible polymeric shell that has an interior cavity and is configured to engage rifling in a barrel so that the marking projectile spins when fired through the barrel. The marking projectile further includes a non-aqueous shear-thinning marking composition within the interior cavity of the polymeric shell. The marking composition comprises an organic solvent, a thickener, a surfactant, and an optional colorant. The marking composition is stable over time and across a wide range of operating conditions. A non-lethal firearm cartridge is also provided and comprises the marking projectile disposed in the mouth of a casing, and a propelling system adapted to expel the projectile from the casing and through a barrel when fired from a firearm.

Apr 15, 2025

US12276001 - Process for preparation and use of inorganic markers for security identification/marking on explosives, fuses and ammunition after detonation and on firearms and metal projectiles, products obtained and process of inserting markers on explosives, fuses and ammunition and on firearms and metal projectiles

With respect to an unprecedented process of preparation of inorganic fluorescent markers under the action of infrared light, for identification and marking, by a specific insertion process, in explosives, fuses, ammunition after detonation, as well as the identification and marking of steel and metal alloys of firearms and metal projectiles an improvement includes the physical insertion of the markers in the channel and in the crucible of the pig iron production process; in this improved process, marking was carried out in the ratio of 1 part of the marker to 1,325,750 parts per mass of pig iron.