Here's the question this week's document answers: now that putting a few hundred satellites in orbit is almost routine, what is actually hard about running a constellation? The answer is everything that comes after launch. A constellation is not a pile of satellites; it is a geometric arrangement that has to be maintained — spacing, phasing, plane alignment — for years, while individual units drift, degrade, and die.
Momentus Space's grant US12630306B2, "Systems and methods for maintenance of a spacecraft constellation" (issued May 19, 2026), names that problem directly. Its CPC tags — B64G 1/1078 and B64G 1/1085 (constellation arrangement and management) with B64G 1/6462 (coupling/servicing) — describe treating the fleet as the unit of engineering, not the individual satellite. That framing is the whole point.
Three documents, one story — except this time the three are three different failure modes the patent has to manage at once. First, station-keeping: orbits decay and perturb, so satellites must constantly nudge themselves back into formation. Second, replenishment: when a unit fails, the constellation has to absorb the loss and slot in a replacement without leaving a coverage hole. Third, disposal: at end of life, satellites must be moved out of the way, an increasingly non-optional task as orbital debris pressure rises. A maintenance method has to hold all three in view simultaneously.
Zoom out and the economics explain the engineering. A constellation operator's cost is dominated not by the splashy first launch but by the multi-year grind of keeping the fleet healthy and compliant. The operator that maintains its constellation most efficiently — least propellant per satellite-year, fewest coverage gaps, cleanest disposals — wins on the only metric that compounds over a decade-long deployment. Momentus, an in-space transportation and infrastructure company, is positioning its IP exactly at that recurring-cost layer.
The honest limit: a granted method on constellation maintenance is a claim on an approach, not evidence of a fleet being maintained, and Momentus itself has had a turbulent operational history. The patent tells you how the company proposes to treat the problem; it does not tell you that the approach is flying or that it works at scale. As ever on this desk, I'll name the underlying document and not let the claim outrun it.
Watch this: as the first generation of large LEO constellations ages past its design life, maintenance — replenishment cadence, disposal compliance, formation upkeep — moves from a footnote to the headline. The patents being filed now, like this one, are the early map of who intends to own that recurring problem. Deployment was the last decade's hard part; upkeep is this one's.