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For the Inventor, By the Inventor

Toronto, Canada

Imperial Oil Limited


USPTO Granted Patents = 29


Trademarks = 1

Forward Citations = 1,032

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28 inventors (with patents filed for the assignee):

goldMedal Emerson Sanford (4 out of 4 patents)

silverMedal Kenneth Porteous (3 out of 3 patents)

bronzeMedal Thaddeus E Kizior (3 out of 3 patents)

4.  Robert Shaw (3 out of 3 patents)

5.  Leslie Salgo (2 out of 2 patents)

6.  John C Todd (2 out of 4 patents)

7.  Clinton R Smith (2 out of 10 patents)

8.  Victor Kaminsky (2 out of 2 patents)

9.  Lloyd W Trevoy (2 out of 3 patents)

10.  Alvin Maskwa (2 out of 3 patents)

11.  Patrick Berstein (2 out of 2 patents)

12.  Harry E Henderson (2 out of 2 patents)

13.  Lubomyr M Cymbalisty (1 out of 7 patents)

14.  Thomas K Perkins (1 out of 34 patents)

15.  A Gordon Alexander (1 out of 11 patents)


Core Competencies:
Polysaccharides
Traction Fluid
Bitumen Extraction
Centrifuging
Heavy Minerals
Water Filtration
Emulsifying Agents
Recovery Processes
Subterranean Heating
Coking
Dual Control Systems
Electrical Heating

29 patents:

1. 5292507 - Method of using polysaccharides to stabilize microorganisms for (1994-03-08),
2. 4558211 - Transaction terminal system (1985-12-10),
3. 4553362 - Prefabricated building units (1985-11-19),
4. 4533778 - Traction fluid lubricants derived from mineral oil (1985-08-06),
5. 4387256 - Traction fluid lubricants derived from coal tar (1983-06-07),
6. 4383914 - Dilution centrifuging of bitumen froth from the hot water process for (1983-05-17),
7. 4313228 - Wireless link between vehicles and a stationary installation (1982-01-26),
8. 4225433 - Filtration of hot water extraction process whole tailings (1980-09-30),
9. 4201656 - Process aid addition in hot water process based on feed fines content (1980-05-06),
10. 4197937 - Non-ionic emulsifying release agent for bituminous sands conveyor belt (1980-04-15),
11. 4172811 - Process of treating bituminous sands conveyor belt with release agent (1979-10-30),
12. 4172025 - Process for secondary recovery of bitumen in hot water extraction of tar (1979-10-23),
13. 4150093 - Method for concentrating heavy minerals in the solids tailings from hot (1979-04-17),
14. 4146125 - Bitumen-sodium hydroxide-water emulsion release agent for bituminous (1979-03-27),
15. 4138467 - Method for concentrating heavy minerals in the solids tailings from hot (1979-02-06),
Company Overview
Imperial Oil Limited is a leading Canadian integrated oil company based in Toronto, specializing in the exploration, production, and refining of petroleum products. The company operates across various segments of the oil and gas industry, including upstream exploration and production, as well as downstream refining and marketing. Imperial is committed to advancing technology and innovation in energy, focusing on sustainable practices and efficient resource management to meet the evolving demands of the energy sector in Canada and beyond.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

29 Patents

#51 in Toronto

#481 in Canada

#22,530 in the World

Toronto, CA
Toronto, Canada

Imperial Oil Limited

Forward Citations = 1,032

28 inventors:

goldMedal Emerson Sanford (4 out of 4 patents)

silverMedal Kenneth Porteous (3 out of 3 patents)

bronzeMedal Thaddeus E Kizior (3 out of 3 patents)

4.  Robert Shaw (3 out of 3 patents)

5.  Leslie Salgo (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Imperial Oil Limited. Retrieved from https://idiyas.com/company/imperial-oil

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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