Air Force

Chromium removal from PVC filters

A non-destructive method to remove residual chromium from PVC filter fibers, enabling more accurate measurement of total chromium in workplace environments

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Image: Michael Pereckas

Chromium metals and hexavalent chromium are known health hazards monitored in workplace environments. Occupation health professionals use PVC filters for the monitoring and analysis of the total chromium present in a workplace environment. However, chromium background is present in the PVC filters, and current analytical analysis methods lack the ability to discern environmentally harvested chromium materials, from chromium that is present as a result of manufacturing byproducts in the filters.

The Air Force has patented a method which uses hydrogen peroxide and heat to remove the background concentration of chromium from the filters, permitting more accurate measurements of hexavalent and total chromium present in workplace environments. The process also can be used to remove chromium during the PVC polymer manufacturing process.

Prenegotiated License Terms

Non-Exclusive
Partially Exclusive
Exclusive
License Execution Fee
$1,000
N/A
N/A
Royalty on Gross Sales
2%
N/A
N/A
Minimum Annual Royalty
$1,000
N/A
N/A
Sublicensing Passthrough Royalty
N/A
N/A
N/A
Annual Patent Fee
$1,000
N/A
N/A

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