The mechanism the claim protects is the transfer itself. US10513352B2, "Method and system for transferring a satellite from an initial orbit into a mission orbit" (granted 2019 to Airbus Defence and Space SAS), addresses how a satellite gets from where the launcher drops it to where it is supposed to work. The CPC cluster — B64G 1/007, B64G 1/1085, B64G 1/402, B64G 1/405 — spans spacecraft orbit transfer, propulsion, and the systems that coordinate them.
Here is the trade that makes this worth patenting. Chemical propulsion gives you a fast, expensive climb to orbit; electric propulsion gives you a cheap, slow one. Going electric can cut the propellant mass dramatically — which means a smaller, cheaper launch — but the satellite then has to spiral outward under gentle thrust for weeks or months before it earns revenue. The transfer is no longer a quick burn; it is a managed campaign, and the claim is about doing that campaign well.
Why the dependent claims are the ballgame here: the broad concept of orbit-raising is ancient. What is defensible is the specific method of executing a low-thrust transfer — sequencing the thrusting, managing the geometry, getting to mission orbit efficiently. That is exactly the kind of operational detail a prime like Airbus accumulates and protects, because it is reusable across an entire product line of electric-propulsion satellites.
As a portfolio signal, this grant reads as infrastructure IP rather than a headline invention. It is the connective tissue that makes an all-electric satellite line viable — the methods you need once you have committed to trading launch mass for transfer time. A prime that owns the transfer methodology owns part of the efficiency of every electric platform it builds.
The discipline, as ever: a method claim describes an approach to the transfer, not a guarantee of how fast or fuel-efficiently any specific satellite reaches orbit. But placed alongside the thruster-level grants covered elsewhere on this desk — counter-torque, electric thrust vectoring — it completes a coherent picture. The sector is patenting the entire electric-propulsion stack, from the physics of the thruster up to the mission-level transfer it enables. The slow climb to orbit is not an afterthought; it is claimed ground.