The History of the Product and its Evolution


Expired US Patent 4,963,280, Wilkins & Thompson, Known as PROA ®:

The concept of Polarized Refrigerant Oil Additive (PROA ®) technology was developed in the late 1980’s by Dr. C.H. Wilkins, Dean of the Dept. of Metallurgy, University of Alabama and Dr. Charles Thompson, Retired Chemical Engineer, DuPont Chemical and a Professor at the University of Alabama. They also named Mr. Jack Hammack as co-inventor. Mr Hammack was in charge of sales of the product. They patented their air conditioning additive concept under US Patent 4,963,280 which became known as the Wilkins & Thompson patent.

Though awarded their patent, there were numerous complications with the Wilkins & Thompson technology, including the chemical structure itself which caused the manufacturing process to consistently fail and never achieve the desired results. The product damaged compressors.

Due to the failure of the product and lack of sales the partnership between Wilkins & Thompson dissolved in the early 90’s, a lawsuit followed and each party was awarded a third of the patent with the Chief Tribologist and lead chemist, Dr. Charles Thompson, moving to Houston, TX to take the technology in a new direction. In Houston, he joined forces with Mr. Sgarbi, an industry expert with extensive chemical process manufacturing knowledge and expertise. Sgarbi built a sophisticated chemical separator and reactor and was able to make the end product (PROA ®). Mr. Sgarbi then formed the PolarShield Corporation.

Mr. Sgarbi is credited for developing the sophisticated set of processes that allowed chemicals to bond together and perform as described in the Wilkins & Thompson patent. He also developed the trade secrets to the various manufacturing processes.

Mr. Sgarbi first named the PolarShield product PROA ® and trademarked it with the U.S. Patent and Trademark Office (trademark serial: 76158191). Any company claiming to sell a PROA ® is in direct infringement of this Trademark. PROA ® is a registered US trademark owned by Powertron Global. Polarized Refrigerant Oil Additives where invented and brought to market by PolarShield.

PolarShield’s PROA ® technology was tested by the Department of Energy (DOE) and approved under the Federal Energy Management Program (FEMP).  There have been several companies that have tried to duplicate the PROA® product without success. Although Wilkins and Thompson are deceased and the PROA® patent is now expired and is public domain, it is of little value without the trade secrets critical to the PROA ® manufacturing process. Any company selling PROA is selling a copy of an antiquated and obsolete technology.

The PROA ® product performed very well until major changes in the HVAC industry were mandated by Congress in the late 90’s. The new laws required the ozone-depleting refrigerants be replaced with more ozone-friendly refrigerants. This series of actions rendered the PolarShield PROA® incompatible and ineffective with HVAC systems to the point that using a PROA ® in today’s equipment is likely to harm the equipment. For example: if a PROA® is installed in a refrigeration system that has a leak, it turns acidic and damages the equipment.


Knowing his PROA® was not the answer to solving the problem of thermal degradation in HVAC(R), Mr. Sgarbi redesigned and perfected his refrigeration performance solution. His efforts resulted in four new patents in 2000 relating to nanoscience processes and products under the new name of Nucleo Molecular Regenerative® technology (NMR®). This new NMR® technology is compatible with all of the new types of refrigerants. Mr. Sgarbi also used this new technology to develop new products compatible with the legacy systems and the older refrigerants that remain in service.

The HVAC industry is still in process of transitioning to the newer refrigerants and synthetic oils. One product alone will not solve the chemical compatibility requirements needed to ensure safe usage across the various equipment in the market today.

Powertron Global® was formed. The company’s new product line with NMR® technology is marketed under the PermaFrost NMR® name. There are several formulations of PermaFrost NMR® designed for different types of applications and refrigeration requirements.

Powertron Global’s patented PermaFrost NMR® formulations are specifically designed and patented to reverse thermal degradation and permanently prevent it from reoccurring.  PermaFrost NMR® formulations work in a synergistic manner to activate, lubricate, and improve thermo-conductivity of the heat exchangers without compromising the existing components of a refrigeration system.

Active US Patents:  6,286,323 ; 6,276,147

Powertron Global’s R&D, led by founder Sgarbi, relentlessly tests new products, chemicals and venues to improve the existing products and develop better and more efficient methods of improving the world in which we live.  Our chemistry team has diligently worked and perfected this technology over decades of research and development.

PermaFrost NMR® vs. PROA®

PROA® was first generation technology; a technology which is now over 20 years old.
PROA® technology was short lived because it had incompatibility problems with new refrigerants mandated by the EPA.
PROA® manufactured under the Wilkins patent was flawed because it damaged equipment. PROA’s react with moisture, causing acid reaction. Almost all systems leak at some point in their life cycle. PROA’s fatal flaw was that PROA® + Moisture = Acid
PermaFrost NMR® is an entirely new modern formulation that is 100% safe, compatible, and industry proven. It uses different chemical technology and has been patented because of its innovation.

The PermaFrost NMR® line of products is protected by four patents that are chemically different from the original PROA® Wilkins technology and are afforded unique protection under US patent law.

PermaFrost NMR® is 100% safe and effective. PermaFrost NMR® product line has proven to be extremely effective and is the worlds leading sustainability solution and energy conservation measure.