The Patent That Was Never Filed

The Client's Situation

The company had a small team, serious electrochemistry credentials, and a plan to file patents on a sulfide-based solid electrolyte — the chemistry that had drawn most of the field's attention and, they assumed, held the most promise.

Their Series A investors had asked the obvious question: what is your IP position in a field where Toyota, Samsung and Panasonic have been filing for a decade?

The founders wanted a patentability search on their sulfide electrolyte formulation. We suggested, before spending money on that, that they let us show them the field first.

The Complication

The landscape study confirmed the founders' worst suspicion, and then contradicted their strategy.

Mapping filings across sulfide, oxide and polymer electrolyte chemistries — by assignee, jurisdiction, filing year and technical sub-cluster — produced a picture that was stark. The sulfide electrolyte space was dense, mature and vigorously defended, dominated by a small number of very large Asian filers with deep, layered portfolios stretching back years. Filing activity there had been accelerating, not slowing.

Worse, the density was concentrated precisely around the compositional territory the client intended to claim. Whatever they filed there would be narrow, hemmed in by earlier families, and expensive to prosecute. It would also raise a freedom-to-operate problem: even a granted patent of their own would not clear their path to sell.

The founders had come for a patentability search on an invention. The honest answer was that the invention was in the wrong place.

"The client expected validation for their existing invention. Instead, the landscape revealed that the real opportunity lay somewhere entirely different — in a space the industry's biggest players had largely overlooked."

The Turn

But a landscape does not only show you where the field is crowded. It shows you where it is not — and that is the harder, more valuable half of the analysis.

Clustering the field by technical taxonomy rather than by chemistry alone, our analysts looked past the electrolyte materials themselves and into the adjacent problems the field had not solved. Filing density dropped sharply in one area in particular: the electrolyte–electrode interface — specifically, interface coating and stabilization approaches addressing dendrite formation and interfacial resistance.

The pattern was telling. The large incumbents were racing to own the material. Far fewer were filing on the interface engineering that would determine whether the material ever worked in a manufacturable cell.

That was the white space. And it happened to sit close to where the client's team had genuine, differentiated experimental know-how — expertise they had regarded as a supporting technique rather than the invention itself.

The Escalation

The founders made the decision that defines this case study: they did not file the patent they came to file.

Instead, they redirected a significant portion of their R&D program toward the interface work, and we drafted a foundational application around it — claims scoped deliberately broadly across the interface approach, with the incumbents' dense material portfolios mapped so that our claims sat clear of them.

Over the following months, as the client's experimental results came in, we drafted more applications building outward from that foundation: coating composition, process/manufacturing method, cell architecture, etc. Each was scoped against a landscape we updated as the field moved, because in a field filing this fast, an eighteen-month-old landscape is a historical document.

We also placed the client's portfolio on patent watch, monitoring the incumbents' newly published applications — filings publish eighteen months after priority, so the field they were competing against was always, in effect, eighteen months ahead of what anyone could see.

The Outcome

The client's portfolio came to cover a defensible position in a space the largest players had left comparatively open, adjacent to — rather than colliding with — the material patents they could never have out-filed.