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.

Assignee: General Dynamics Ordnance and Tactical Systems—Canada, Inc.
Inventors: Charles-Olivier Gilbert, Sophie Dufort, Marc Palardy, Isabelle Theobald, Francois Rouillard, Mathieu Desrosiers
Filing date: 2024-12-06

non-lethalprojectilecartridgemarking

The patent describes a non-lethal marking projectile featuring a frangible polymeric shell that engages barrel rifling for spinning during firing, and contains a stable non-aqueous marking composition. Additionally, it includes a cartridge designed to expel the projectile using a propelling system when fired from a firearm.

Claim 1

1 . A marking projectile comprising: a frangible polymeric shell comprising a cylindrical portion and having an interior cavity, wherein the frangible shell is configured to engage rifling in a barrel so that the marking projectile spins when fired through the barrel; and a marking composition within the interior cavity, the marking composition being a non-aqueous shear-thinning fluid and comprising: an organic solvent, a thickener, a surfactant, and optionally, a colorant. a frangible polymeric shell comprising a cylindrical portion and having an interior cavity, wherein the frangible shell is configured to engage rifling in a barrel so that the marking projectile spins when fired through the barrel; and a marking composition within the interior cavity, the marking composition being a non-aqueous shear-thinning fluid and comprising: an organic solvent, a thickener, a surfactant, and optionally, a colorant.

Google Patents

https://patents.google.com/patent/US12742621

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12742621