The proposal never made it beyond the conceptual stage.
Nasa is considering one called HyspIRI, which is still in the conceptual stage.
The plot to attack the airport did not advance beyond the conceptual stage.
Monday to Friday We are amid a creative bonanza at the moment with three projects at the "conceptual stage".
City transportation planners, who are collaborating with the memorial's staff, said the bus plan still remained in the conceptual stage.
This is why the conceptual stage is so exciting: trying to find a solution to satisfy the brief, acknowledge the location yet still be creatively stimulating.
THE MARTS OF TRADE about a business idea still in a conceptual stage, conceived by Thomas B. Mechling & Clement L. Despard.
The plot never advanced beyond the conceptual stage, and the planning sessions, some of which were recorded by a confidential informant, were alternately grandiose and absurd.
"It's never gotten past the conceptual stage because of all the problems involved," said Tom Kelly, a spokesman for the Metropolitan Transportation Authority, the parent agency of the subway.
Meanwhile, we're in our first round of fundraising, via both grants and Kickstarter, to firm up the financials and move TED from the conceptual stage to its first instantiation.
By John Brooks The New Yorker, October 9, 1971 P. 138 THE MARTS OF TRADE about a business idea still in a conceptual stage, conceived by Thomas B. Mechling & Clement L. Despard.
