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Helsinki, Finland

Ahlstrom Machinery Oy

USPTO Granted Patents = 30

Forward Citations = 173

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55 inventors (with patents filed for the assignee):

Holger Engdahl (3 out of 10 patents)

Ari Pelkio (3 out of 3 patents)

Pekka Tormikoski (3 out of 3 patents)

4. Raimo Paju (2 out of 4 patents)

5. Erkki J Kiiskila (2 out of 15 patents)

6. Erik Agren (2 out of 3 patents)

7. Pentti Vikio (2 out of 2 patents)

8. Jorma Simonen (1 out of 9 patents)

9. Jukka Savolainen (1 out of 2 patents)

10. Mikko Hupa (1 out of 5 patents)

11. Harri Qvintus (1 out of 5 patents)

12. Arto Koso (1 out of 5 patents)

13. Joseph R Phillips (1 out of 39 patents)

14. Pekka Tervola (1 out of 4 patents)

15. Arto Ahvenainen (1 out of 3 patents)

30 patents: Sort by Forward Citations

1. 6096120 - Deaeration vessel (2000-08-01),

2. 6090240 - Method of inhibiting scaling in black liquor evaporators (2000-07-18),

3. 6086713 - Method of treating pulp (2000-07-11),

4. 6074521 - Method of separating impurities from lime and lime sludge (2000-06-13),

5. 6030494 - Method of treating melodorous gases of a pulp mill (2000-02-29),

6. 6024028 - Protection of the air ports of a recovery boiler (2000-02-15),

7. 5996806 - Method and apparatus for treating filler-containing material such as (1999-12-07),

8. 5989018 - Lime sludge feed arrangement (1999-11-23),

9. 5976319 - Disrupting the flow from the smelt spout of a recovery boiler (1999-11-02),

10. 5960962 - Screen (1999-10-05),

11. 5897788 - Method and apparatus for cleaning a filter drum used for thickening lime (1999-04-27),

12. 5879511 - Recovery boiler operation with black liquor feed in separate liquid (1999-03-09),

13. 5837096 - Falling film evaporator (1998-11-17),

14. 5800674 - Method and apparatus for improving a batch cooking process (1998-09-01),

15. 5788813 - Clarifying and/or filtering of green liquor and an apparatus therefore (1998-08-04),

Ahlstrom Machinery Oy is a leading global manufacturer of machinery and equipment for the pulp and paper industry. With over 100 years of experience, we provide innovative solutions for our customers' production processes. Our product range includes various types of paper machines, pulpers, slitters, dewatering equipment, and automation systems. We are dedicated to delivering high-quality equipment that enhances efficiency, sustainability, and profitability for our customers in the paper industry.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

30 Patents

#33 in Helsinki

#112 in Finland

#21,181 in the World

Helsinki, Finland

Ahlstrom Machinery Oy

Forward Citations = 173

55 inventors:

Holger Engdahl (3 out of 10 patents)

Ari Pelkio (3 out of 3 patents)

Pekka Tormikoski (3 out of 3 patents)

4. Raimo Paju (2 out of 4 patents)

5. Erkki J Kiiskila (2 out of 15 patents)

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