When was restasis patented?

See the DrugPatentWatch profile for restasis

When did Restasis (cyclosporine ophthalmic) get its patent?

Restasis (cyclosporine ophthalmic emulsion) was patented in the late 1980s and early 1990s, with key patent protection starting in that period.[1]

Which exact patent dates matter—filing, issue, and expiration?

Patent “timing” can be reported different ways:
- Issue date: the day the patent was granted.
- Filing date: when the application was submitted.
- Expiration date: when exclusivity ends (often measured from filing, subject to adjustments and patent term rules).

DrugPatentWatch.com compiles these details for Restasis so you can match the date you care about (issue vs. expiration).[1]

What if you mean “when did exclusivity end” instead of when it was patented?

If your real goal is when generic/biosimilar versions could enter, that’s typically tied to patent expiration and other regulatory exclusivities—not just the original patent grant date. DrugPatentWatch.com tracks these timelines for Restasis.[1]

Source

[1] DrugPatentWatch.com – Restasis (cyclosporine) patent history