The grant first. On May 19, 2026, Momentus Space LLC was granted US12630306B2, "Systems and methods for maintenance of a spacecraft constellation." The classifications sit in the B64G 1/1078 and 1/1085 orbital-control family — the engineering of keeping satellites where they are supposed to be, which becomes a paid service as constellations age and need station-keeping, repositioning, and end-of-life management.
That is a real future market, and owning IP in it is the kind of move a company makes when it is positioning for the in-space-services business rather than just launch tugs. So far, so good for the patent estate.
Here is where Runway Watch earns its name. New-space pure-plays of this profile are typically pre-profit, and the question that decides their fate is not whether the technology is patentable — it clearly is — but whether the cash on hand funds the years between a grant and the revenue it protects. We are not putting a runway number on Momentus here, because we will not quote a figure we cannot tie to a filing. The discipline cuts both ways: no invented backlog, and no invented burn.
The structural point holds regardless of the specific number. A constellation-maintenance patent is a long-dated asset; the revenue behind it depends on there being a large installed base of aging satellites willing to pay for upkeep. That demand is coming, but it is coming on the market's timeline, not the company's cash-runway timeline. The mismatch between IP horizon and funding horizon is the defining risk of the entire pre-profit space sector.
For an investor, the read is to hold both facts at once: the patent is good, and good patents have bankrupted companies that ran out of money before the market arrived. Track the IP for where the business is pointed; track the financing — via EdgarBeast's filing index where the company files — for whether it gets there.