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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
N2 TOWERS INC	ONTARIO CANADA

International Classification(s)

• A62C:FIRE-FIGHTING

• 2013 Application Filing Year
• A62C Class
• 241 Applications Filed
• 221 Patents Issued To-Date
• 91.71 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
GOETZ, GEORGE	Fountain Hills, US	3	19
# of filed Patents : 3 Total Citations : 19
RICHARDSON, ADAM T	Calgary, CA	4	26
# of filed Patents : 4 Total Citations : 26

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Patent Citation Ranking

• 2 Citation Count
• A62C Class

• 9.72 % this patent is cited more than
• 12 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jun 19, 2025

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 11.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

Full Text

US Patent No: 9200819

Optimizing the efficiency and energy usage of a geothermal multiple heat pump system

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Abstract

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A system and a method for operating the system is provided to optimize heat exchange between a geothermal loop and a heat pump load loop for heating and cooling a structure. In the method, the flow rate through the earth loop is adjusted based on current thermal demand of a heat pump array, so as to reduce the electrical demand of the earth loop circulator when thermal demand from the heat pump loop is low. The method adjusts the speed of the earthloop circulator as required for the operating conditions of the heat pumps and earth loop, thereby permitting efficient laminar flow whenever possible, as long as thermal demand is met.

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Description

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Claims

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Legal Events

 

• MAFP2023
• AS�2019
• AS2019
• AS2019
• MAFP2019
• AS�2017
• AS�2016
• AS�2015
• I2015
• STCF2015
• F2013
• PD2008

Date	Code	Event	Description
Apr 06, 2023	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 8
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Dec 06, 2019	AS	ASSIGNMENT	free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CITIZENS BANK, N.A., AS AGENT;REEL/FRAME:051214/0847 Owner name: TACO, INC., RHODE ISLAND Effective Date: Dec 06, 2019
May 31, 2019	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4
Nov 14, 2017	AS�	SECURITY INTEREST	free format text: SECOND AMENDED AND RESTATED PATENT SECURITY AGREEMENT;ASSIGNOR:TACO, INC.;REEL/FRAME:044510/0934 Owner name: CITIZENS BANK, N.A., AS AGENT, MASSACHUSETTS Effective Date: Nov 14, 2017
Mar 03, 2016	AS�	SECURITY INTEREST	free format text: RELEASE BY SECURED PARTY;ASSIGNOR:CITIZENS BUSINESS CAPITAL, A DIVISION OF CITIZENS ASSET FINANCE, INC., AS AGENT;REEL/FRAME:037936/0222 Owner name: TACO, INC., RHODE ISLAND Effective Date: Mar 03, 2016 free format text: AMENDED AND RESTATED PATENT SECURITY AGREEMENT;ASSIGNOR:TACO, INC.;REEL/FRAME:038046/0866 Owner name: CITIZENS BANK, NATIONAL ASSOCIATION, MASSACHUSETTS Effective Date: Mar 03, 2016
Dec 30, 2015	AS�	SECURITY INTEREST	free format text: ABL PATENT SECURITY AGREEMENT;ASSIGNOR:TACO, INC.;REEL/FRAME:037398/0609 Owner name: CITIZENS BUSINESS CAPITAL, A DIVISION OF CITIZENS Effective Date: Dec 30, 2015 free format text: TERM PATENT SECURITY AGREEMENT;ASSIGNOR:TACO, INC.;REEL/FRAME:037398/0616 Owner name: CITIZENS BANK, NATIONAL ASSOCIATION, AS AGENT, MAS Effective Date: Dec 30, 2015
Dec 01, 2015	I	Issuance
Nov 11, 2015	STCF	INFORMATION ON STATUS: PATENT GRANT	free format text: PATENTED CASE
Feb 15, 2013	F	Filing
Nov 01, 2008	PD	Priority Date