The Belgian businessman sold the club to Abu Dhabi-based consortium East Street Investments on Friday.
Tahnoon Nimer and Jonathan Heller, chairman and CEO of Abu Dhabi Business Development respectively, join the Championship club as directors, with Matt Southall becoming club chairman.
Despite having the lowest budget in the Championship under Duchatelet, Charlton, who were one of the bookmakers’ favourites to go down at the start of the season, have made a solid start to life in England’s second tier.
Lee Bowyer’s side are 17th after 18 games and seven points clear of the relegation zone.
But the Addicks are winless in six matches, with their most recent setback coming in a 2-1 defeat to relegation-threatened Luton on Tuesday.
Charlton’s poor run of form has been largely down to a seemingly ever-growing injury list.
Bowyer currently has 12 first-team players unavailable through injury, including influential duo Lyle Taylor and Jonny Williams, who are both out with knee injuries.
Charlton's huge injury list
- Lyle Taylor (knee)
- Jonny Williams (knee)
- Ben Amos (finger)
- Chuks Aneke (groin)
- Sam Field (knee)
- Jake Forster-Caskey (hamstring)
- Tomer Hemed (thigh)
- George Lapslie (hamstring)
- Lewis Page (hamstring)
- Josh Cullen (ankle)
- Beram Kayal (groin)
- Erhun Oztumer (foot)
Taylor scored five goals in his first six games before being sidelined in September, while Williams registered five assists.
Ben Amos (finger), Chuks Aneke (groin), Sam Field (knee), Jake Forster-Caskey (hamstring), Tomer Hemed (thigh), George Lapslie (hamstring), Lewis Page (hamstring), Josh Cullen (ankle), Beram Kayal (groin) and Erhun Oztumer (foot) were also unavailable to Bowyer for the defeat at Luton.
It is going to be difficult to find a bigger injury list in the Football League, which has seen Bowyer name just six substitutes on the bench for their past two games against Cardiff and Luton.
It forced the former Leeds star to hand a start to Albie Morgan – a 19-year-old midfielder who was recalled from a loan spell with non-league club Ebbsfleet United earlier this month – at Luton.
Academy graduate Alfie Doughty has also made two substitute appearances in the past week, which highlights Bowyer’s lack of senior options.
On Thursday, Bowyer revealed Oztumer is the only injured player who has a chance of returning for the visit of Sheffield Wednesday on Saturday, which is LIVE on talkSPORT 2.
He said: “All the players that are fit are defenders, so at the minute I’m trying to juggle and adapt to who we’re playing and put out a team and still create chances.
“We’re doing that and we’re still scoring goals and yeah, we’re conceding but that is our strength at the moment – our backline. We’ve got eight defenders and seven of them are fit.
“It’s in the middle of the park and up top that we’re short, but we’re still managing to score goals.
“We just can’t hold on to leads at the moment. That’s the one thing that frustrates me for sure.
“Oztumer is 50/50. It’s whether his foot recovers in time. If anyone comes back it will be him and only him.”
To make Bowyer’s job even harder, Chelsea loanee Conor Gallagher is serving a one-match ban after picking up his fifth yellow card of the campaign.
The 19-year-old midfielder is Charlton’s top scorer with six goals this season.
Sheffield Wednesday will be favourites to beat Charlton, but the Valley could be packed out with many boycotting fans coming back ‘home’ following Duchatelet’s departure.