Eligibility is the first hurdle
Software is not barred from patent protection in the US, but claims that amount to an abstract idea carried out on a generic computer are routinely rejected or invalidated under the eligibility framework the Supreme Court has set. Claims tend to fare better when they describe a specific technical improvement, such as a change in how a computer, a network, or a data structure actually works, rather than a business result achieved with ordinary computing. Examiners and courts apply that framework unevenly, and USPTO guidance has shifted over time, including for inventions that involve machine learning. Clearing eligibility is not the end of it: the invention also has to be new and not obvious over earlier work.
Disclosure and inventorship
Timing can matter as much as content. The US gives inventors a limited grace period after their own public disclosure, but many other countries give little or none, so a product launch, a conference talk, or an open-source release before filing can close doors abroad. Named inventors have to be people, and where AI tools contributed to the work, the question of what counts as a human inventive contribution draws close attention. Bring descriptions of the architecture, any drafts or diagrams, the dates of any demos or releases, and a list of everyone who contributed to the core idea.
Choosing the right protection
Not every valuable piece of software should be patented. A patent requires publishing how the invention works, and an algorithm that runs on your own servers and cannot be observed from outside may be better kept as a trade secret, while the code itself is covered by copyright. Some companies file on what competitors can see or reverse engineer and keep the rest confidential. Enforcement is worth thinking about early too, since infringement of a server-side method can be hard to detect or prove. Early discussion of a software invention usually focuses on what is new in the system, what a competitor could detect, and where a filing would justify its cost.
