Patent holdings for IPC class D21C 3/00

Total number of patents in this class: 312

10-year publication summary

39
23
27
17
16
22
20
14
23
13
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
SixRing Inc.
162
21
Valmet AB
503
10
GranBio Intellectual Property Holdings, LLC
119
9
FPInnovations
245
7
Andritz Inc.
333
6
Bio-sep Limited
7
6
International Paper Company
791
6
Voith Patent GmbH
2756
6
Lenzing Aktiengesellschaft
522
5
Shell Oil Company
2141
4
The Coca-Cola Company
2492
4
Eth Zurich
1273
4
Nicca Chemical Co., Ltd.
133
4
University of Maryland, College Park
1013
4
Shell Internationale Research Maatschappij B.V.
3551
3
E. I. du Pont de Nemours and Company
4095
3
Novozymes A/S
3318
3
Purdue Research Foundation
3583
3
API Intellectual Property Holdings, LLC
77
3
Compagnie Industrielle de La Matiere Vegetale - Cimv
27
3
Other owners 198