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For the Inventor, By the Inventor

Mississauga, Canada

Hatch Ltd.


USPTO Granted Patents = 75

% Expired Patents = 18.7



Trademarks = 15

Forward Citations = 225

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134 inventors (with patents filed for the assignee):

goldMedal Maciej Urban Jastrzebski (8 out of 8 patents)

silverMedal Bert O Wasmund (8 out of 9 patents)

bronzeMedal Afshin Sadri (8 out of 9 patents)

4.  Kevin S Fraser (7 out of 7 patents)

5.  Terry Gerritsen (6 out of 6 patents)

6.  Robert John Fraser (6 out of 6 patents)

7.  Robert J Veenstra (6 out of 8 patents)

8.  Sean Southall (6 out of 6 patents)

9.  Murray Scott Pearson (6 out of 6 patents)

10.  John Andrew Ferguson Shaw (5 out of 5 patents)

11.  Nils W Voermann (5 out of 6 patents)

12.  Michael Morgan Campbell (4 out of 4 patents)

13.  Evangelos Stamatiou (4 out of 4 patents)

14.  Kamal Adham (4 out of 4 patents)

15.  Felim Patrick McCaffrey (4 out of 15 patents)


Core Competencies:
Metal Sulfate Crystallization
Electric Arc Furnace Control
Energy Harvesting
Furnace Cooling Systems
Electrode Control
Metallurgical Reactor
Nickel Products
Power Generation
Solvent Inventory Management
Flash Smelting
Steelmaking Process
Thermal Management

75 patents:

1. 12704485 - Systems, methods and apparatus for acousto-ultrasonic assessment of metallurgical vessels (2026-08-11),
2. 12522510 - Sodium sulfate by-product processing in lithium and battery chemical production (2026-01-13),
3. 12442065 - System and method for coating of continuous sheets of metal (2025-10-14),
4. 12441621 - Treatment process for crystallizing a metal sulfate (2025-10-14),
5. 12281027 - Processes for crystallizing metal sulfates and methods for producing crystallized metal sulfates (2025-04-21),
6. 12145636 - Device, system and method for detecting leakage current for traction power system (2024-11-19),
7. 12054401 - Process and method for producing crystallized metal sulfates (2024-08-06),
8. 11873539 - Ferronickel alloy direct refining processes and processes for producing nickle sulfate or other nickel products (2024-01-16),
9. 11384986 - Open arc condition mitigation based on measurement (2022-07-12),
10. 11146067 - Line control circuit configuration (2021-10-12),
11. 11122654 - Flicker control for electric arc furnace (2021-09-14),
12. 11029092 - Magnetic energy harvesting device and method for electric metallurgical furnaces and similar environments (2021-06-08),
13. 11021942 - Methods of managing solvent inventory in a gravity drainage extraction chamber (2021-06-01),
14. 10995014 - Process for producing crystallized metal sulfates (2021-05-04),
15. 10889906 - Low-profile aluminum cell potshell and method for increasing the production capacity of an aluminum cell potline (2021-01-12),
Hatch Ltd. is an engineering organization providing consulting, project management, and operational support services to various industries. With expertise in engineering design, construction, and operation, Hatch delivers innovative solutions that optimize performance and efficiency. Headquartered in Canada, Hatch has been serving clients globally for over 60 years and has established a reputation for excellence in delivering sustainable and value-driven projects.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Sep 15 2026

Hatch Ltd.
75 Patents

#9 in Mississauga

#166 in Canada

#9,983 in the World

Mississauga, CA
Mississauga, Canada

Hatch Ltd.

Forward Citations = 225

134 inventors:

goldMedal Maciej Urban Jastrzebski (8 out of 8 patents)

silverMedal Bert O Wasmund (8 out of 9 patents)

bronzeMedal Afshin Sadri (8 out of 9 patents)

4.  Kevin S Fraser (7 out of 7 patents)

5.  Terry Gerritsen (6 out of 6 patents)

Please report any incorrect information to [email protected]
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