Patents
US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026
10 patents granted to the 4 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to Enbridge, Inc’s names, not what it holds today.
Patents granted
10
10 utility, 1976 to Dec 31, 2025
Granted in 2025
1
Against 1 in 2024 and none in 2023
Applications published
6
1 of them in 2025
Names they are printed under
4
a subsidiary, its own name
By yearGrantedApplications published
'96'11'12'13'14'15'17'24'25
Each pair is one calendar year. Applications are published about eighteen months after filing, so the newest years read low.
What they are aboutgrants since 2021
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name4 counted
Questar Gas Company a subsidiary
US, as the owner printed on each patent
4 publishedSPECTRA ENERGY CORP a subsidiary
US, as the owner printed on each patent
2 publishedEnbridge, Inc. its own name
CA, as the owner printed on each patent
0 publishedSt. Clair Pipelines Ltd. a subsidiary
CA, as the owner printed on each patent
0 published
Newest grantseach row opens the USPTO’s own copy
| Granted | Patent | Title | Field | Owner as printed |
|---|
| Mar 4, 2025 | 12,241,299 | Door swing control device and associated method | Civil engineering | Questar Gas Company |
| Jan 9, 2024 | 11,866,978 | Door swing control device and associated method | Civil engineering | Questar Gas Company |
| Apr 18, 2017 | 9,625,097 | Methods and systems for reducing pressure of natural gas and methods and systems of delivering natural gas | Mechanical elements | Questar Gas Company |
| Jun 9, 2015 | 9,052,049 | Device for opening and closing pig trap doors | Mechanical elements | SPECTRA ENERGY CORP |
| Sep 16, 2014 | 8,833,088 | Methods and systems for reducing pressure of natural gas and methods and systems of delivering natural gas | Mechanical elements | Questar Gas Company |
| Dec 24, 2013 | 8,613,201 | Methods and systems for reducing pressure of natural gas and methods and systems of delivering natural gas | Mechanical elements | Questar Gas Company |
| Sep 3, 2013 | 8,523,252 | Lift device for service operations on mechanical parts | Handling | SPECTRA ENERGY CORP |
| May 28, 2013 | 8,450,022 | Fuel cell hybrid power generation system and method for gas distribution systems | Electrical machinery, apparatus, energy | Enbridge, Inc. |
| Dec 20, 2011 | 8,080,344 | Fuel cell hybrid power generation system | Electrical machinery, apparatus, energy | Enbridge, Inc. |
| Jun 11, 1996 | 5,525,133 | Gas pipeline drip | Mechanical elements | St. Clair Pipelines Ltd. |
Newest applications publishedan application is a clue, never a plan
| Published | Application | Title | Field | Owner as printed |
|---|
| Jun 26, 2025 | 2025/0205859 | Adjustable Wrench | Machine tools | Questar Gas Company |
| Jan 1, 2015 | 2015/0000757 | METHODS AND SYSTEMS FOR REDUCING PRESSURE OF NATURAL GAS AND METHODS AND SYSTEMS OF DELIVERING NATURAL GAS | Mechanical elements | Questar Gas Company · patent 9,625,097 granted from it |
| Sep 27, 2012 | 2012/0242100 | LIFT DEVICE FOR SERVICE OPERATIONS ON MECHANICAL PARTS | Handling | SPECTRA ENERGY CORP · patent 8,523,252 granted from it |
| Sep 20, 2012 | 2012/0234422 | DEVICE FOR OPENING AND CLOSING PIG TRAP DOORS | Mechanical elements | SPECTRA ENERGY CORP · patent 9,052,049 granted from it |
| Mar 10, 2011 | 2011/0056571 | METHODS AND SYSTEMS FOR REDUCING PRESSURE OF NATURAL GAS AND METHODS AND SYSTEMS OF DELIVERING NATURAL GAS | Mechanical elements | Questar Gas Company · patent 8,833,088 granted from it |
| Mar 10, 2011 | 2011/0056570 | METHODS AND SYSTEMS FOR REDUCING PRESSURE OF NATURAL GAS AND METHODS AND SYSTEMS OF DELIVERING NATURAL GAS | Mechanical elements | Questar Gas Company · patent 8,613,201 granted from it |
What it applied for, 2024 to 2025: Machine tools 1.
A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.