William Christopher Duffy

Person

Thornhill, CA

People

Patents Grantslast 30 patents

Information Patent Grant
Pre-fabricated modular fire-rated conduit assembly
- Patent number 12,188,679
- Issue date Jan 7, 2025
- VAUGHANAIR CANADA ULC
- William Christopher Duffy
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Fire-rated ventilation duct and improvements therein
- Patent number 12,152,802
- Issue date Nov 26, 2024
- VAUGHANAIR CANADA ULC
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Pre-fabricated modular fire-rated conduit assembly
- Patent number 11,441,810
- Issue date Sep 13, 2022
- DURASYSTEMS BARRIERS INC.
- William Christopher Duffy
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Fire-rated modular duct assembly suitable for exhausting flammable...
- Patent number RE49087
- Issue date May 31, 2022
- DURASYSTEMS BARRIERS INC.
- William Christopher Duffy
Information Patent Grant
Fire-rated ventilation duct and improvements therein
- Patent number 11,333,390
- Issue date May 17, 2022
- DURASYSTEMS BARRIERS INC.
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Fire-rated modular duct assembly and improvements therein
- Patent number 10,024,569
- Issue date Jul 17, 2018
- William Christopher Duffy
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Fire-rated modular duct assembly suitable for exhausting flammable...
- Patent number 9,557,071
- Issue date Jan 31, 2017
- William Christopher Duffy
- E04 - BUILDING
Information Patent Grant
Fire-rated modular duct assembly suitable for exhausting flammable...
- Patent number 9,074,788
- Issue date Jul 7, 2015
- William Christopher Duffy
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Fire resistant access panel for ducts and air handling equipment
- Patent number 8,276,319
- Issue date Oct 2, 2012
- Durasystems Barriers, Inc.
- William Christopher Duffy
- E04 - BUILDING

Patents Applicationslast 30 patents

Information Patent Application
FIRE-RATED VENTILATION DUCT AND IMPROVEMENTS THEREIN
- Publication number 20250052445
- Publication date Feb 13, 2025
- VaughanAir Canada ULC
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING
Information Patent Application
PRE-FABRICATED MODULAR FIRE-RATED CONDUIT ASSEMBLY
- Publication number 20220404063
- Publication date Dec 22, 2022
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING
Information Patent Application
FIRE-RATED VENTILATION DUCT AND IMPROVEMENTS THEREIN
- Publication number 20220268480
- Publication date Aug 25, 2022
- Durasystems Barriers Inc.
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING
Information Patent Application
FIRE-RATED VENTILATION DUCT AND IMPROVEMENTS THEREIN
- Publication number 20210302058
- Publication date Sep 30, 2021
- Durasystems Barriers Inc.
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING
Information Patent Application
PRE-FABRICATED MODULAR FIRE-RATED CONDUIT ASSEMBLY
- Publication number 20190154295
- Publication date May 23, 2019
- Durasystems Barriers Inc.
- William Christopher Duffy
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
FIRE-RATED MODULAR DUCT ASSEMBLY SUITABLE FOR EXHAUSTING FLAMMABLE...
- Publication number 20150267937
- Publication date Sep 24, 2015
- William Christopher Duffy
- E04 - BUILDING
Information Patent Application
FIRE-RATED MODULAR DUCT ASSEMBLY AND IMPROVEMENTS THEREIN
- Publication number 20150101697
- Publication date Apr 16, 2015
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING
Information Patent Application
FIRE-RATED MODULAR DUCT ASSEMBLY SUITABLE FOR EXHAUSTING FLAMMABLE...
- Publication number 20130174934
- Publication date Jul 11, 2013
- William Christopher Duffy
- E04 - BUILDING
Information Patent Application
PANEL FOR ACOUSTIC DAMPING AND FIRE PROTECTION APPLICATIONS
- Publication number 20100108438
- Publication date May 6, 2010
- William Christopher DUFFY
- B32 - LAYERED PRODUCTS
Information Patent Application
Fire resistant access panel for ducts and air handling equipment
- Publication number 20080115418
- Publication date May 22, 2008
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING
Information Patent Application
METHOD AND APPARATUS FOR A MODULAR FIRE-BARRIER SYSTEM
- Publication number 20070251723
- Publication date Nov 1, 2007
- William Christopher Duffy
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Application
Fire resistant access panel for ducts and air handling equipment
- Publication number 20060143987
- Publication date Jul 6, 2006
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING
Information Patent Application
Apparatus for a fire-rated duct
- Publication number 20050116470
- Publication date Jun 2, 2005
- William Christopher Duffy
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Application
Fire resistant access panel for ducts and air handling equipment
- Publication number 20020184827
- Publication date Dec 12, 2002
- William Christopher Duffy
- F24 - HEATING RANGES VENTILATING

William Christopher Duffy

Person

Patents Grantslast 30 patents

Pre-fabricated modular fire-rated conduit assembly

Fire-rated ventilation duct and improvements therein

Pre-fabricated modular fire-rated conduit assembly

Fire-rated modular duct assembly suitable for exhausting flammable...

Fire-rated ventilation duct and improvements therein

Fire-rated modular duct assembly and improvements therein

Fire-rated modular duct assembly suitable for exhausting flammable...

Fire-rated modular duct assembly suitable for exhausting flammable...

Fire resistant access panel for ducts and air handling equipment

Patents Applicationslast 30 patents

FIRE-RATED VENTILATION DUCT AND IMPROVEMENTS THEREIN

PRE-FABRICATED MODULAR FIRE-RATED CONDUIT ASSEMBLY

FIRE-RATED VENTILATION DUCT AND IMPROVEMENTS THEREIN

FIRE-RATED VENTILATION DUCT AND IMPROVEMENTS THEREIN

PRE-FABRICATED MODULAR FIRE-RATED CONDUIT ASSEMBLY

FIRE-RATED MODULAR DUCT ASSEMBLY SUITABLE FOR EXHAUSTING FLAMMABLE...

FIRE-RATED MODULAR DUCT ASSEMBLY AND IMPROVEMENTS THEREIN

FIRE-RATED MODULAR DUCT ASSEMBLY SUITABLE FOR EXHAUSTING FLAMMABLE...

PANEL FOR ACOUSTIC DAMPING AND FIRE PROTECTION APPLICATIONS

Fire resistant access panel for ducts and air handling equipment

METHOD AND APPARATUS FOR A MODULAR FIRE-BARRIER SYSTEM

Fire resistant access panel for ducts and air handling equipment

Apparatus for a fire-rated duct

Fire resistant access panel for ducts and air handling equipment