The decline in CFCs in our atmosphere as a result of those measures now mean the ozone layer is expected to have fully recovered sometime in the 2060s, according to the report by the UN Environment Programme, World Meteorological Organization, European Commission and other bodies.
It prevents damage to the earth's ecosystems and provides protection against skin cancer. "Most potential is in increasing the energy efficiency of these appliances as 80% of the emissions are due to the use of electricity and 20% due to the release of the refrigerants", said Chandra Bhushan, deputy director general of the Centre for Science and Environment (CSE).
The Protocol was in response to the revelation that chlorofluorocarbons (CFCs) and other ozone-depleting substances - used in aerosols, cooling and refrigeration systems, and many other items - were tearing a hole in the ozone layer and allowing unsafe ultraviolet radiation to flood through.
The scientific assessment, released at a conference in Ecuador today, was described as "really good news" by Paul Newman, chief Earth scientist at Nasa's Goddard Space Flight Center. The Southern Hemisphere lags a bit and its ozone layer should be healed by mid-century.
The chlorofluorocarbons (CFCs) effectively began eating away at the ozone.
This is due to internationally agreed actions carried out under the historic Montreal Protocol, which came into being over 30 years ago.
The ozone layer starts at about 6 miles (10 kilometers) above Earth and stretches for almost 25 miles (40 kilometers); ozone is a colorless combination of three oxygen atoms.
But since 2000, it has begun to increase again by about three percent per decade, according to the United Nations report.
This year, the ozone hole over the South Pole peaked at almost 9.6 million square miles (24.8 million square kilometers).
It's not a complete success yet, according to the University of Colorado's Brian Toon, who was not part of the report.
"The Antarctic ozone hole is recovering, while continuing to occur every year", the report said.
However, while most of the banned damaging gases have been phased out, the study found at least one violation - having spotting that production and emission of CFC-11 unexpected increased in eastern Asia since 2012.
This healing progress is attributed to worldwide initiatives under the Montreal Protocol, a global agreement that was formed more than 30 years ago in response to climate change concerns.
And the replacements to CFCs that are now being used to cool cars and refrigerators need to be replaced with other chemicals because they worsen global warming, Mr Newman said.
"I don't think we can do a victory lap until 2060", Newman said.
Durwood Zaelke, president of the Institute for Governance and Sustainable Development, said: "Over the last three decades, the Montreal protocol has fulfilled its original objective to heal the ozone layer".