"We find ourselves at a historic moment," Biden told Lourenço, at the beginning of a meeting between the two at the White House.
"The partnership between Angola and the United States is more important than ever", noted the North American President in the Oval Office.
Asked by a journalist if he would visit Angola, Biden replied: "I've been there and I'll be back."
The US head of state promised to visit Africa this year when he hosted the African continent's leaders last December, but the White House has repeatedly refused to say when Biden would make the trip and there is no indication it will happen before 2024.
In his opening statements, in the presence of the press, Biden said he was proud of the work carried out through the Partnership for Global Infrastructure and Investments (PGI) for the Lobito Corridor, which will connect Angola, the Democratic Republic of Congo and Zambia to markets global.
"This unprecedented project is the largest railway investment ever by the United States in Africa and will create jobs and connect markets for generations to come" declared the North American leader, stressing that it is an investment in excess of one billion dollars.
The President of the United States, who wants to compete with China and Beijing's gigantic investments in Africa, also mentioned North American financing in solar energy and agricultural development projects in Angola.
Joe Biden also thanked João Lourenço for his "work for peace" in the east of the Democratic Republic of Congo, a region shaken for decades by conflicts, and in particular by the rebellion of the armed group M23 (March 23 Movement).
In turn, the Angolan head of state considered that Joe Biden was the first North American President to "change the paradigm of cooperation between the United States and the African continent".
"We are open to cooperating with the United States of America in all domains, including economy, defense and security, transport and energy, telecommunications, agriculture, space exploration for peaceful purposes and other domains that were in the interests" of both countries, stated the Angolan leader.
The meeting between Biden and Lourenço lasted less than an hour and, at the end, in a brief statement to the press covering the meeting, the Angolan head of state said there was a "total opening on the part of the United States Government" and that Angola will benefit from that.