US 12,458,715 B2
Ultra-violet A (UVA) and ultra-violet C (UVC) system and methods for inactivation, reduction and inhibition of growth of coronavirus
Andrew Clark Baird Aubert, Waterdown (CA)
Assigned to Helios Shield Ltd., London (GB)
Appl. No. 17/299,378
Filed by 2449049 ONTARIO INC., Mississauga (CA); and HELIOS SHIELD LTD, London (GB)
PCT Filed Apr. 20, 2021, PCT No. PCT/CA2021/050543
§ 371(c)(1), (2) Date Jun. 3, 2021,
PCT Pub. No. WO2021/223012, PCT Pub. Date Nov. 11, 2021.
Application 17/299,378 is a continuation in part of application No. 16/984,366, filed on Aug. 4, 2020, granted, now 12,409,245.
Claims priority of provisional application 63/019,534, filed on May 4, 2020.
Claims priority of provisional application 62/984,360, filed on Mar. 3, 2020.
Claims priority of application No. PCT/CA2020/051059 (WO), filed on Jul. 31, 2020.
Prior Publication US 2023/0063654 A1, Mar. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61L 2/10 (2006.01); A61L 2/24 (2006.01)
CPC A61L 2/10 (2013.01) [A61L 2/24 (2013.01); A61L 2202/11 (2013.01)] 41 Claims
OG exemplary drawing
 
1. A UVA/UVC system for reducing levels, on a surface, and inhibiting further growth of human coronavirus on said surface, wherein said system has no deleterious effects on a human eye, epidermis and dermis, wherein said system comprises:
i) an inanimate surface;
ii) at least one UVA light source;
iii) at least one UVC light source; and
iv) at least one controller connected to each of said at least one UVA light source and said at least one UVC light source, for controlling at least one parameter of each of said UVA light source and UVC light source selected from light source, light intensity, radiated power level, wavelength, exposure time and combinations thereof; wherein said at least one UVC light source emits UVC light to said inanimate surface for a period of time reducing the level of said human coronavirus on said inanimate surface to a level that is safe for humans, and said at least one UVA light source emits UVA light to said inanimate surface for a period of time inhibiting growth of said human coronavirus on said inanimate surface, such that during the time said at least one UVC light source and said at least one UVA light source is emitting on said inanimate surface, radiation levels from said at least one UVC light source and said at least one UVA light source is safe to humans; wherein when said at least one UVC light source is emitting UVA light to said inanimate surface, said at least one UVC light is off, and when said at least one UVA light source is emitting light to said inanimate surface, said at least one UVC light source is off; wherein cycling between said at least one UVC light source and said at least one UVA light source is controlled by said at least one controller; wherein said at least one UVA light source has an operating wavelength of from about 385 nanometers (nm) to about 400 nm and a power rating of from about 10 milliwatts (mW) to about 100 watts (W); and said at least one UVC light source has an operating wavelength of from about 275 nm to about 295 nm and a power rating from about 10 mW to about 100 W, wherein said UVA power rating remains constant during the exposure time inhibiting growth of said human coronavirus on said surface and said UVC power rating remains constant during the exposure time reducing the level of said human coronavirus on said surface, and said exposure time of emitting each of said i) UVA light source; ii) said UVC light source, and iii) a determined period of blanking time wherein both said UVA light source and said UVC light source are off, before recommencing the cycle of UVC and UVA light exposure onto said inanimate surface, is regulated on and/or off based solely on time.