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Latest Issues

A New Patent Cliff Is Coming – The Buy Signal For Biotech

The pharmaceutical industry is walking into the largest loss-of-exclusivity event in its history a few years from now. Somewhere between $180 billion and $400 billion in branded drug revenue will be exposed to patent expiration between 2028...

21 days ago
5

When Not to Patent: Trade Secrets, Stealth Launches & the Public Record

By Kunal Chandiramani, Co-Founder, ZeroToIP & Daniel Gould, General Partner, Castle Fund

In Part 1 of this series, we made the case that your IP portfolio is probably your most undervalued asset. We walked through why patents matter for fu...

a month ago

The Patent Time Bomb: How AI Might Rewrite IP Strategy

The venture capital industry sees patents as a signal of competitive advantage, especially in deep tech sectors with long pre-revenue product development cycles. A startup with a granted patent portfolio often gets a higher valuation, both...

4 months ago

Commercializing IP: A framework for deep tech investors

Castle Fund invests at the seed stage in deep tech companies with wide IP moats. We spend a lot of time evaluating whether a technology works AND whether it’s defensible.

Many early-stage investors can spot a compelling technical breakthro...

4 months ago
1

Castle Fund: Space Startups in 2026

Castle Fund‘s three pillar vertical sectors are biotech, energy and aerospace. Within those, we like some sub-sectors that have reached technical inflection points and investment momentum.

For the space sector, launch cost is no longer the...

4 months ago

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  • Gold Dragon Ventures

    venture partner (golddragonventures.com), musician, media exec

  • Daniel Gould (Castle Fund)

    Managing Partner, Castle Fund (seed stage deep tech VC focused on wide IP moats)

  • Kunal Chandiramani

    CEO at ZeroToIP

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