Building a patent portfolio gets a lot of attention. Maintaining it rarely does, and most companies let filings accumulate for years without ever asking which ones are still earning their keep. The result is a portfolio full of dead weight, quietly costing renewal fees on claims that stopped mattering to the business years ago.
Review Annually With a Hard Question
I now run an annual portfolio review that asks one blunt question about every patent: if I stopped paying maintenance fees on this today, would the business actually be worse off. If the honest answer is no, because the underlying product was discontinued, the technology was superseded internally, or the claim never ended up covering anything competitors were actually copying, it's a candidate to abandon.
That review has real teeth once you calculate actual maintenance costs across a large portfolio. Renewal fees compound and escalate over a patent's life in most jurisdictions, and a portfolio built up over a decade without ever being pruned can carry a meaningful ongoing cost that nobody in finance is tracking as a discrete line item, because it's buried inside general legal expense.
Pruning Also Clarifies Strategy
Beyond the direct cost savings, pruning forces a clearer articulation of which patents actually matter to the current business strategy. A lean, well-maintained portfolio of claims that map directly to active products or genuine licensing opportunities is a stronger diligence story for a buyer or investor than a sprawling portfolio where nobody can quickly explain why half the filings still exist.
I now treat portfolio pruning as an annual discipline, the same category of review as pruning underperforming SKUs or terminating unused vendor contracts. An IP portfolio that's never been pruned isn't a sign of thoroughness. It's usually a sign nobody's looked at it critically in years.