Observed arrival · 2026-10-28
Cliffwatch’s FDA patent-cliff calendar
A searchable calendar of FDA Orange Book listed protection dates for branded drugs, with change tracking and optional watchlist alerts.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Pharma researchers tracking branded-drug protection dates
- Worth noticing
- Its date caveat says FDA does not verify Orange Book listings and litigation or settlements can change actual launch timing.
Field notes
The calendar assigns each drug to the year of its earliest unexpired listed patent or exclusivity on a marketed reference-listed strength. Its change feed includes specific generic approvals and an exclusivity-expiration notice, with sample entries linked to Drugs@FDA. The page says Orange Book data was last ingested on 28 Oct 2026 and refreshes daily; it also cautions that applicant-listed dates are not verified by FDA.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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