How to Search Espacenet Like a Professional

Go to worldwide.espacenet.com → click Advanced Search. Enter 2–4 technical terms in the "Title or abstract" field. Review results and note the classification codes on the most relevant patents.

Click on any relevant patent → "Classifications" tab. Note the CPC/IPC codes (e.g., A01G 27/00 for self-watering systems). These codes categorise the technology regardless of language.

Enter classification codes in the CPC/IPC field. This finds patents regardless of keywords used — including patents in German, Japanese, Chinese that would never appear in an English keyword search. Combine with keywords for precision.

AND (both terms), OR (either term), NOT (exclude), quotation marks for exact phrases, asterisk (*) for wildcards. Example: (capillary OR wicking) AND (planter OR flowerpot).

Click on a relevant patent → "INPADOC patent family" tab. See every related application worldwide — which countries the inventor filed in reveals which markets they consider commercially important.

Click "INPADOC legal status" tab. See whether a patent is in force, lapsed, expired, or opposed. A lapsed patent means the technology is free to use in that jurisdiction.

"Cited documents" → what prior art was cited. "Citing documents" → what later patents cite this one. This citation network discovers related patents you'd never find through keywords alone.

Create a free account → save searches as alerts. Espacenet emails you when new patents matching your criteria are published. Essential for monitoring competitor activity.