Common use of Payment of COH Patent Expenses Clause in Contracts

Payment of COH Patent Expenses. The Parties acknowledge that, prior to the Option Effective Date, COH provided to Licensee documentation of historic expenses incurred by COH with respect to the drafting, prosecution and maintenance of the Patent Rights. In consideration of such historic expenditures by COH, Licensee shall reimburse COH for [***] percent of such expenses within [***] days of the Effective Date; subject to a maximum of $[***]. EXECUTION COPY Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission. Confidential Treatment Requested by Homology Medicines, Inc. COH shall provide to Licensee an annual invoice and reasonably detailed documentation with respect to COH’s reasonable out-of-pocket expenses incurred with respect to prosecution and maintenance of Core Patents. Licensee shall reimburse COH for [***] percent of such expenses within [***] days after receipt of such invoice and documentation.

Payment of COH Patent Expenses. The Parties acknowledge that, prior to the Option Effective Date, COH provided to Licensee documentation of historic expenses incurred by COH with respect to the drafting, prosecution and maintenance of the Patent Rights. In consideration of such historic expenditures by COH, Licensee shall reimburse COH for [***] percent of such expenses within [***] days of the Effective Date; subject to a maximum of $[***]. EXECUTION COPY Confidential Portions of this Exhibit marked as [***] have been omitted pursuant to a request for confidential treatment and have been filed separately with the Securities and Exchange Commission. Confidential Treatment Requested by Homology Medicines, Inc. COH shall provide to Licensee an annual invoice and reasonably detailed documentation with respect to COH’s reasonable out-of-pocket expenses incurred with respect to prosecution and maintenance of Core Patents. Licensee shall reimburse COH for [***] percent of such expenses within [***] days after receipt of such invoice and documentation.