Low-cost rapid thermo-chemical decontamination process for facemasks or other personal protection equipment (PPE) and related system and apparatus

Patent metadata

Field	Value
Publication number	US-12337074-B2
Application number	US-202117169260-A
Country	US
Kind code	B2
Filing date	Feb 5, 2021
Priority date	Apr 24, 2020
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A system for decontaminating personal protection equipment includes a microwave oven and a decontamination apparatus configured to be placed in and heated by the microwave oven. The decontamination apparatus includes a containment vessel having an interior space configured to be sealed. The decontamination apparatus also includes one or more stands within the interior space, where the one or more stands are configured to receive and hold one or more pieces of personal protection equipment to be heated by the microwave oven and decontaminated within the interior space. The decontamination apparatus further includes a pressure-relief valve configured to be opened to release a pressure within the interior space.

First claim

What is claimed is:

1. A method comprising:
soaking one or more pieces of personal protection equipment in a disinfectant;
placing the one or more soaked pieces of personal protection equipment within a containment vessel;
heating the containment vessel to allow air in the containment vessel to escape through a pressure-relief valve and be substantially replaced with vapor;
sealing the one or more soaked pieces of personal protection equipment within the containment vessel by closing the pressure-relief valve;
decontaminating the one or more soaked pieces of personal protection equipment by heating the one or more soaked pieces of personal protection equipment in the sealed containment vessel;
protruding a microwave-safe indicator from a surface of the containment vessel when the decontamination is completed; and
opening the pressure-relief valve of the containment vessel.

2. The method of claim 1 , further comprising:
drying the one or more decontaminated pieces of personal protection equipment by reheating the one or more decontaminated pieces of personal protection equipment in the containment vessel.

3. The method of claim 2 , wherein, when drying the one or more decontaminated pieces of personal protection equipment, water and disinfectant escape the containment vessel through the pressure-relief valve.

4. The method of claim 1 , wherein the disinfectant comprises an about 3% to about 6% hydrogen peroxide solution.

5. The method of claim 1 , wherein heating the one or more soaked pieces of personal protection equipment in the sealed containment vessel comprises heating the one or more soaked pieces of personal protection equipment to a temperature of about 65° C. to about 80° C.

6. The method of claim 1 , wherein heating the one or more soaked pieces of personal protection equipment in the sealed containment vessel comprises heating the one or more soaked pieces of personal protection equipment to a temperature of about 70° C.

7. The method of claim 1 , wherein heating the one or more soaked pieces of personal protection equipment in the sealed containment vessel comprises using a microwave oven.

8. The method of claim 1 , wherein the one or more pieces of personal protection equipment comprise at least one of: one or more facemasks, one or more surgical gowns, one or more gloves, and one or more surgical booties.

Assignees

• Raytheon Co

Inventors

• Carroll Iii Alf L
• Sar David R
• Crouch David D
• Carcone John

Classifications

• A61L2/186

  Peroxide solutions · CPC title

• A61L2209/211

  Use of hydrogen peroxide, liquid and vaporous · CPC title

• B08B13/00

  Accessories or details of general applicability for machines or apparatus for cleaning · CPC title

• B08B2230/01

  Cleaning with steam · CPC title

• B08B7/0035

  by radiant energy, e.g. UV, laser, light beam or the like · CPC title