Description
Class D21D : TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
Subclass 1/02: Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type
D21D 1/02
Sub-Class
Stats
- 10 US PATENTS IN FORCE
- 2 US APPLICATIONS PENDING
- 2 Total Patent Owners
- 35 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11840806 | Environmentally-friendly method for enhancing mechanical properties of high antibacterial nano dialysis paper for medical protection | Apr 21, 23 | Dec 12, 23 | ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY |
| 11739477 | Production of modified pulp | Oct 29, 19 | Aug 29, 23 | SCA FOREST PRODUCTS AB |
| 11383189 | Preparation method of cotton bast fiber and chitosan composite non-woven fabric for filtration | Mar 28, 19 | Jul 12, 22 | JIANGNAN UNIVERSITY |
| 11214925 | Method of preparing recycled cellulosic fibers to improve paper production | Mar 08, 21 | Jan 04, 22 | Pulmac Systems International, Inc. |
| 11131064 | Aramid fiber far-infrared emitting paper and preparation method thereof | Aug 22, 18 | Sep 28, 21 | NANOCARBON CO., LTD. |
| 11028536 | Defibrated material manufacturing device, and sheet manufacturing apparatus | May 11, 20 | Jun 08, 21 | SEIKO EPSON CORPORATION |
| 10676867 | Defibrated material manufacturing device, and sheet manufacturing apparatus | Jul 30, 18 | Jun 09, 20 | SEIKO EPSON CORPORATION |
| 10400394 | Method for engineering fibers to improve paper production | Feb 13, 18 | Sep 03, 19 | Pulmac Systems International, Inc. |
| 10196775 | Method for processing grass for manufacturing paper, paperboard and cardboard | Dec 17, 14 | Feb 05, 19 | Not available |
| 6761798 | Method for forming an Arundo donax paper product | Dec 15, 00 | Jul 13, 04 | WASHINGTON STATE UNIVERSITY, TreeFree Biomass Solutions, Inc., |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0295,074 | METHODS FOR PRODUCING PULP AND PAPER PRODUCTS FROM PLANTS HAVING BAST AND HURD FIBERS | Dec 30, 21 | Sep 05, 24 | Not available |
| 2019/0217,232 | Preparation Method of Cotton Bast Fiber and Chitosan Composite Non-woven Fabric for Filtration | Mar 28, 19 | Jul 18, 19 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 26 Months (last 2 years Issuances)
- 26 Months (last 5 years Issuances)