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Helsinki, Finland

Enso-gutzeit Oy

USPTO Granted Patents = 32

Forward Citations = 226

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44 inventors (with patents filed for the assignee):

Pertti Puumalainen (4 out of 7 patents)

Holger Engdahl (3 out of 10 patents)

Pentti Vikio (3 out of 5 patents)

4. Antti Kuhasalo (3 out of 3 patents)

5. Seppo Kokkonen (3 out of 3 patents)

6. Tapani Penttinen (2 out of 30 patents)

7. Matti Salste (2 out of 5 patents)

8. Hannu Kurittu (2 out of 2 patents)

9. Riitta Koskiniemi (2 out of 3 patents)

10. Juhani Kyytsonen (2 out of 4 patents)

11. Rauno Rantanen (2 out of 4 patents)

12. Pertti Sikanen (2 out of 2 patents)

13. Harri Qvintus (2 out of 4 patents)

14. Juha S Titoff (2 out of 5 patents)

15. Tauno Turunen (2 out of 2 patents)

32 patents: Sort by Forward Citations

1. 5843316 - Method of separating sodium hydroxide from white liquor or polysulfide (1998-12-01),

2. 5840385 - Cover for product package and method for producing same (1998-11-24),

3. 5738933 - Mutli-layer product (1998-04-14),

4. 5595196 - Method of producing a filter cigarette with tipping paper having lip (1997-01-21),

5. 5510035 - Method of separating sodium hydroxide from white liquor (1996-04-23),

6. 5022962 - Method for the treatment of spent liquors in pulp production (1991-06-11),

7. 4980023 - Method for manufacturing paper or cardboard and product containing (1990-12-25),

8. 4795170 - Packing arrangement for sealing the surface of a rotary drum like object (1989-01-03),

9. 4769986 - Apparatus for washing cellulose with a rotary drum (1988-09-13),

10. 4762590 - Causticizing process (1988-08-09),

11. 4687583 - Procedure for filtering lime sludge meant to be regenerated to lime (1987-08-18),

12. 4683816 - Drum press (1987-08-04),

13. 4681935 - Procedure for recovering soluble carbohydrates contained in wood (1987-07-21),

14. 4671878 - Means for clearing the blocked reject end of a vortex purifier (1987-06-09),

15. 4657678 - Twin hydrocyclone (1987-04-14),

Enso-gutzeit Oy is a Finnish pulp and paper company based in Helsinki. The company specializes in the production of high-quality paper, pulp, and other forest-based products. With a strong focus on sustainable practices, Enso-gutzeit Oy is committed to reducing its environmental impact through responsible sourcing and efficient production processes. For more information, visit their website.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

32 Patents

#29 in Helsinki

#107 in Finland

#20,053 in the World

Helsinki, Finland

Enso-gutzeit Oy

Forward Citations = 226

44 inventors:

Pertti Puumalainen (4 out of 7 patents)

Holger Engdahl (3 out of 10 patents)

Pentti Vikio (3 out of 5 patents)

4. Antti Kuhasalo (3 out of 3 patents)

5. Seppo Kokkonen (3 out of 3 patents)

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