Our corporate and research and development operations are located in San Francisco, California, where we lease approximately 234,000 square feet of office and laboratory space with approximately 30,000 square feet subleased.
−Removed: The lease for our San Francisco headquarters expires in 2023.
+Added: The lease for our San Francisco headquarters was originally scheduled to expire in 2023, and in June 2021, we amended the lease to extend it through 2028.
We also lease approximately 67,000 square feet of office and manufacturing space in Beijing, China, and multiple office spaces in Beijing and Shanghai, China.
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We believe our facilities are adequate for our current needs and that suitable additional or substitute space would be available if needed.
−Removed: LEGAL PROCEEEDINGS
−Removed: We are a party to various legal actions that arose in the ordinary course of our business.
−Removed: We recognize accruals for any legal action when we conclude that a loss is probable and reasonably estimable.
−Removed: We did not have any material accruals for any currently active legal action in our consolidated balance sheets as of December 31, 2020, as we could not predict the ultimate outcome of these matters, or reasonably estimate the potential exposure.
−Removed: On April 20, 2020, in response to an invalidation action brought against certain FibroGen United Kingdom patents by Akebia, the United Kingdom court handed down a decision invalidating United Kingdom designations of European Patent Nos.
−Removed: 1463823, 1633333, 2298301, 2322153, and 2322155.
−Removed: The United Kingdom designation to European Patent No.
−Removed: 2289531 was held to be valid in amended form, but not infringed by Akebia.
−Removed: We and our partner Astellas have filed an appeal of the decision in the United Kingdom Court of Appeal.
+Added: LEGAL PROCEEDINGS
+Added: For a discussion of our legal proceedings, refer to Note 9, Commitments and Contingencies , to the consolidated financial statements.
MINE SAFETY DISCLOSURES
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Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.