For the Inventor, By the Inventor

Enter assignee name

Calgary, Canada

Canada-Cities Service, Ltd.

USPTO Granted Patents = 28

Forward Citations = 680

Loading Chart...

Loading Chart...

29 inventors (with patents filed for the assignee):

Lubomyr M Cymbalisty (5 out of 7 patents)

Emerson Sanford (4 out of 4 patents)

Kenneth Porteous (3 out of 3 patents)

4. Thaddeus E Kizior (3 out of 3 patents)

5. Robert Shaw (3 out of 3 patents)

6. Lloyd W Trevoy (3 out of 3 patents)

7. Alvin Maskwa (3 out of 3 patents)

8. Laurier L Schramm (2 out of 4 patents)

9. Russell G Smith (2 out of 3 patents)

10. Victor Kaminsky (2 out of 2 patents)

11. Joseph K Liu (2 out of 2 patents)

12. Robert C Shaw (2 out of 3 patents)

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

14. Loyd R Kern (1 out of 1 patent)

15. Leigh Falkenberg (1 out of 1 patent)

28 patents: Sort by Forward Citations

1. 4489828 - Device for splicing cable ends (1984-12-25),

2. 4474616 - Blending tar sands to provide feedstocks for hot water process (1984-10-02),

3. 4462892 - Control of process aid used in hot water process for extraction of (1984-07-31),

4. 4456536 - Skimmer apparatus for recovering bitumen (1984-06-26),

5. 4383914 - Dilution centrifuging of bitumen froth from the hot water process for (1983-05-17),

6. 4372174 - Method and apparatus for sampling a core of tar sand (1983-02-08),

7. 4328710 - Homogenizer/subsampler for tar sand process streams (1982-05-11),

8. 4284360 - Homogenizer/subsampler for tar sand process streams (1981-08-18),

9. 4282103 - Method for controlling flocculant addition to tar sand tailings (1981-08-04),

10. 4225433 - Filtration of hot water extraction process whole tailings (1980-09-30),

11. 4225422 - Beneficiation of heavy minerals from bituminous sands residues by dry (1980-09-30),

12. 4201656 - Process aid addition in hot water process based on feed fines content (1980-05-06),

13. 4197937 - Non-ionic emulsifying release agent for bituminous sands conveyor belt (1980-04-15),

14. 4172811 - Process of treating bituminous sands conveyor belt with release agent (1979-10-30),

15. 4172025 - Process for secondary recovery of bitumen in hot water extraction of tar (1979-10-23),

Canada-Cities Service, Ltd. is a Calgary-based organization specializing in urban development and infrastructure solutions. The company focuses on enhancing city services through innovative technologies and strategic planning, aiming to improve the quality of life in urban environments. With a commitment to sustainability and efficiency, Canada-Cities Service engages in various projects that address the unique challenges faced by cities, leveraging expertise in areas such as transportation, public safety, and environmental management.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

28 Patents

#32 in Calgary

#503 in Canada

#23,244 in the World

Calgary, Canada

Canada-Cities Service, Ltd.

Forward Citations = 680

29 inventors:

Lubomyr M Cymbalisty (5 out of 7 patents)

Emerson Sanford (4 out of 4 patents)

Kenneth Porteous (3 out of 3 patents)

4. Thaddeus E Kizior (3 out of 3 patents)

5. Robert Shaw (3 out of 3 patents)

Please report any incorrect information to [email protected]

Loading…