1998 – U.S. / UK
Acquired liquid rocket engine business of Royal Ordnance Division of British Aerospace including the Westcott facility in the UK.

2000 – U.S. / UK
Acquired (Hamilton Standard) monopropellant engine product line from Kaiser Marquardt.

2003 – U.S. / UK
Aerojet-General purchased solid propulsion product line assets from Sequa. Federal Trade Commission (FTC) mandated that the liquid propulsion line be divested.

2004 – U.S. / UK
AMPAC entered into negotiations to acquire the liquid propulsion business.

2004 – U.S. / UK
In-Space Propulsion delivered 1,700th 22N Cb ACS engine.

2004 – U.S. / UK
Successfully launched two complete propulsion systems in support of Missile Defense Agency’s (MDA) Critical Measurements Program.

2004 – U.S. / UK
Acquisition by AMPAC completed, with transfer of all assets including facilities in Niagara Falls, NY, and Westcott, UK. New company designation is AMPAC In-Space Propulsion (ISP), a subsidiary of American Pacific Corporation (AMPAC).

2005 – U.S. / UK
Delivered first MMH/MON apogee engine at 318 seconds specific impulse.

2005 – U.S. / UK
Qualified high-performance 22N MMH/MON Pt/Rh ACS engine at 300+ seconds specific impulse.

2006 – U.S. / UK
Flight qualified 5 lbf Pt/Rh engines and LEROS 2b.