The phrase "asserted until" is correct and usable in written English.
It can be used to indicate that something is claimed or stated up to a certain point in time or condition.
Example: "The theory was asserted until new evidence emerged that contradicted it."
Alternatives: "claimed until" or "maintained until".
You asserted, "Until this incident is credibly investigated, there is little hope of moving forward with Israeli-Palestinian peace talks or efforts to curb Iran's nuclear program".
Nobody in the administration had advocated anything close to that position, this official asserted, until Mr. Gore today urged that Congress adopt legislation that would allow Elian to stay in this country while a family court adjudicated his case.
More than 20 members are in jail in Ireland, but though the Irish police have regularly said they know who was behind the bombing in Omagh, they have asserted until now that they lacked the evidence or witnesses to make any charges stick.
The Bulletin didn't start faltering, Taylor asserted, until after McLean forced him to retire as publisher in 1975.
Even though the president asserted that until Gaddafi steps down "Libya will remain dangerous," that doesn't mean using military force.
This assertion was widely accepted, until Boisserie asserted in 2005 that the pygmy hippopotamus was not a member of Hexaprotodon, after a thorough examination of the phylogeny of Hippopotamidae.
"In a Heartbeat," an Icelandic short, focuses on a young outcast "who doesn't do anything to assert herself until she sees someone else being bullied," Ms. Youngerman said.
These forces were in a position to assert themselves until the spring of 2002, during the first year and a half of the current Palestinian uprising, when Israeli troops were making only periodic forays into Palestinian areas.
The material -- some of it from Mr. Rosenwinkel's latest album, "The Next Step" (Verve/Universal) -- is the epitome of sensitive, modest-tempered art, the kind that doesn't assert itself until the moment is right.
"Ready for Revolution" asserts that until 1966 "SNCC had always only had two elected officers: John Lewis, chairman, and Jim Forman, executive secretary"; Marion Barry was elected SNCC's first chairman in April 1960 and Charles McDew took over in October, serving until John Lewis succeeded him in 1963.
Toulouse played within themselves from the start, not asserting themselves until David Skrela was sent to the sin-bin in the 34th minute after Andrew Small had indicated offside for the umpteenth time in what had not been so much of a stop-start half as stop-stop.
