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The phrase "expire by" is grammatically correct and commonly used in written English.
It is typically used to indicate a deadline or time limit for something to end or become invalid. Example: The coupon must be used or it will expire by the end of the month.
Exact(58)
These officially expire by the end of 2010.
The patents are due to expire by 2017.
Still others criticize the requirement that current leases expire by Dec. 31.
The contracts of Marbury, Malik Rose, Quentin Richardson and Jerome James will expire by that summer.
The patents on Plavix and Avapro will expire by 2011, inviting competition from cheap generics.
His term must expire by the end of 2011, when the next session of Congress draws to a close.
Instead, Bush is campaigning to make permanent his existing tax cuts, which are slated to expire by 2011.
Mr. McCain also wants to extend many of the Bush tax cuts, scheduled to expire by Jan . 1 , 2011
The sales tax increase on clothing items worth $110 or less is already set to expire by next June.
Four Boeing 737-300's would have new rates, with monthly payments that expire by December 2007.
Tax cuts enacted by the Bush administration that benefit the wealthy are set to expire by 2011.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com