Colorado’s innovation economy is expanding fast. Denver alone ranked among the top 10 U.S. cities for startup activity in recent years, and with that growth comes a surge in intellectual property filings. Yet a patent application rejection remains one of the most frustrating outcomes an inventor can face—especially when the cause was preventable.

Understanding why rejections happen is the first step toward avoiding them.

Failing to Meet the Written Description Requirement

The written description requirement demands that your application clearly show you actually possessed the invention at the time of filing. This is different from enablement—it’s about proving ownership of the idea, not just explaining how it works.

Common written description failures include:

Claiming features in the claims that aren’t mentioned in the specification

Adding new matter to an application after the filing date

Using generic language that doesn’t distinguish your invention from existing technology

Denver-based patent practitioners frequently cite written description failures as an underappreciated rejection ground—one that catches inventors off guard precisely because it’s less discussed than novelty or obviousness.