The phrase "is extended before" is correct and can be used in written English.
It means that something is being prolonged or stretched out in time or space prior to a certain point or event. Example: The deadline for the project is extended before the holiday break, giving us more time to complete it.
"The court has extended employer responsibility further than it has ever been extended before," he said.
Suddenly the humdrum vocabulary of the action movie has been extended before our disbelieving eyes.
He indicated that the current charter may have to be extended before a new one is put in place.
The size of domestic and business home extensions will be extended before full planning permission is required.
King's contract with the Nets was extended before Game 4, and the team's entire starting lineup is under contract for next season.
Johnson is in the final year of a three-year deal, without any assurance, at least publicly, that it will be extended before the season.
An administration spokesman said Monday that the invitation to help guide the new program was extended before the White House knew the results of the Pentagon investigation.
Williams's contract cannot be extended before the league negotiates a new labor contract with its players, which means he is likely to begin next season in position to become a free agent by the summer of 2012.
Stowed for launch in a bent configuration, the instrument tails will need to be extended before any data gathering is possible.
Since the multi-kernel strategy copes with the sensor failure by itself, we claim that the lifetime of chemo-sensory systems, particularly their constituent chemical sensor devices, can be extended before the replacement of any particular chemical sensor is required.
