The phrase "as having abandoned" is correct and usable in written English.
It can be used to describe a state or condition where someone or something is perceived to have left or given up on a particular situation or responsibility.
Example: "The committee viewed the project as having abandoned its original goals and objectives."
Alternatives: "seen as having forsaken" or "regarded as having left behind".
We must regard the patentee as having conceded an inability to claim the broader subject matter or at least as having abandoned his right to appeal a rejection.
A century later, a new generation of conservatives criticizes Progressivism as having abandoned America's founding values and miring the government in institutional gridlock.
David Cameron's appointment of Rudd to the cabinet is seen as reaffirming the environmental credentials that many saw the prime minister as having abandoned.
General Sisi also harshly criticized the United States as having abandoned Egypt, even as he asked for the Obama administration to use its "leverage and influence" with the Brotherhood to resolve the political conflict.
On Tuesday, after a judge tossed out the criminal charges at the request of the Manhattan district attorney, Cyrus R. Vance Jr., Mr. Thompson assailed Mr. Vance as having "abandoned an innocent woman".
At the same time, with many Israelis viewing the United States as having abandoned its credible military threat against Iran, they have stepped up talk of a strike of their own.
Here, my motive powers returned as mysteriously as they had abandoned me.
Some, such as Whole Foods Market, have abandoned their quest for collective political change in favor of maximizing profits.
But locals complain that the real figure has doubled in the past few years, as farmers have abandoned their land.
Some prominent institutional investors, such as CalPERS, have abandoned hedge funds altogether, citing high fees and too much complexity.
The Energy Union argues against feed-in tariffs (FiTs) for renewables, pressing for premium FiTs (pFiTs), just as GB has abandoned PFiTs in favour of FiTs.
