Description
Class D21F : PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
Subclass 1/02: Wet end of machines for making continuous webs of paper Head boxes of Fourdrinier machines
D21F 1/02
Sub-Class
Stats
- 53 US PATENTS IN FORCE
- 15 US APPLICATIONS PENDING
- 20 Total Patent Owners
- 362 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12234605 | Light weight linerboard for corrugated board | Dec 11, 20 | Feb 25, 25 | Stora Enso Oyj |
| 12157975 | Controlling the slice flow of a slurry through a headbox | Apr 09, 21 | Dec 03, 24 | Andritz, Inc. |
| 12146264 | Paper products having increased bending stiffness and cross-direction strength and methods for making the same | Sep 12, 22 | Nov 19, 24 | International Paper Company |
| 12006604 | Apparatus for forming a substrate | May 28, 21 | Jun 11, 24 | Not available |
| 12006631 | Device and method for producing a fibrous web | Dec 01, 20 | Jun 11, 24 | Andritz AG |
| 11963851 | Headbox for manufacturing a substrate | May 28, 21 | Apr 23, 24 | Not available |
| 11932988 | Foam-based manufacturing system and process | Dec 30, 20 | Mar 19, 24 | Kimberly Clark Worldwide Inc. |
| 11866884 | Method and apparatus for producing a zoned and/or layered substrate | Mar 31, 21 | Jan 09, 24 | Not available |
| 11834788 | Crescent former for producing tissue paper | Aug 27, 21 | Dec 05, 23 | Valmet AB |
| 11814793 | Elongated component for a manufacturing machine of a fibrous cellulosic web, its use and method for recycling | Jun 20, 22 | Nov 14, 23 | VALMET TECHNOLOGIES OY |
| 11788230 | Paper producing apparatus | Sep 27, 21 | Oct 17, 23 | SEIKO EPSON CORPORATION |
| 11661702 | Fiber transport apparatus and fiber transport method | Jun 16, 20 | May 30, 23 | SEIKO EPSON CORPORATION |
| 11512433 | Composition of matter feed to a head box | Jul 26, 19 | Nov 29, 22 | Eastman Chemical Company |
| 11459700 | Method of and an arrangement for adding at least one additional stock component to an approach flow system of a fiber web machine | Dec 18, 20 | Oct 04, 22 | Wetend Technologies Oy; VALMET TECHNOLOGIES OY; |
| 11441273 | Use of a polymer product for deposit formation control in manufacture of paper or board | Nov 22, 17 | Sep 13, 22 | Kemira Oyj |
| 11441268 | Paper products having increased bending stiffness and cross-direction strength and methods for making the same | Jan 04, 19 | Sep 13, 22 | International Paper Company |
| 11377794 | Pulp washer mist eliminator and foam remover system | Jun 18, 19 | Jul 05, 22 | Not available |
| 11352749 | Method of and an arrangement for adding a chemical to an approach flow system of a fiber web machine | Jun 29, 20 | Jun 07, 22 | WETEND TECHNOLOGY OY; VALMET TECHNOLOGIES OY; |
| 11332885 | Water removal between wire and wet press of a paper mill process | Jul 26, 19 | May 17, 22 | Eastman Chemical Company |
| 11326305 | Fibrous body accumulating device and fiber structure producing device | Feb 05, 21 | May 10, 22 | SEIKO EPSON CORPORATION |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0426,054 | SHEET MANUFACTURING APPARATUS | Jun 21, 24 | Dec 26, 24 | Not available |
| 2024/0368,838 | PAPERMAKING MACHINE THAT UTILIZES ONLY A STRUCTURED FABRIC IN THE FORMING OF PAPER | Jul 09, 24 | Nov 07, 24 | Not available |
| 2024/0352,675 | BARRIER LAYERS COMPRISING NANOCELLULOSE ONTO THE SURFACE OF PAPER OR PAPERBOARD SUBSTRATES AT THE WET END OF A PAPERMAKING PROCESS | Apr 18, 24 | Oct 24, 24 | FiberLean Technologies Limited |
| 2024/0279,856 | APPARATUS FOR FORMING A SUBSTRATE | May 03, 24 | Aug 22, 24 | Not available |
| 2024/0254,695 | Process and System for Reorienting Fibers in a Foam Forming Process | Jun 27, 22 | Aug 01, 24 | Not available |
| 2024/0225,911 | HEADBOX FOR MANUFACTURING A SUBSTRATE | Mar 20, 24 | Jul 11, 24 | Not available |
| 2024/0175,204 | Foam-Based Manufacturing System and Process | Feb 05, 24 | May 30, 24 | Not available |
| 2024/0167,227 | BARRIER COATINGS APPLIED TO NANOCELLULOSE-COATED PAPER AND PAPERBOARD | Nov 20, 23 | May 23, 24 | FiberLean Technologies Limited |
| 2024/0141,589 | METHOD AND DEVICE FOR PRODUCING AN MFC FILM | Feb 23, 22 | May 02, 24 | Stora Enso Oyj |
| 2024/0125,048 | METHOD AND APPARATUS FOR PRODUCING A ZONED SUBSTRATE | Nov 29, 23 | Apr 18, 24 | Not available |
| 2021/0246,612 | FIBROUS BODY ACCUMULATING DEVICE AND FIBER STRUCTURE PRODUCING DEVICE | Feb 05, 21 | Aug 12, 21 | Not available |
| 2021/0189,650 | METHOD OF AND AN ARRANGEMENT FOR ADDING AT LEAST ONE ADDITIONAL STOCK COMPONENT TO AN APPROACH FLOW SYSTEM OF A FIBER WEB MACHINE | Dec 18, 20 | Jun 24, 21 | Not available |
| 2019/0360,155 | METHOD FOR PRODUCING A FIBROUS MATERIAL WEB | Sep 15, 16 | Nov 28, 19 | Not available |
| 2019/0211,503 | PAPER PRODUCTS HAVING INCREASED BENDING STIFFNESS AND CROSS-DIRECTION STRENGTH AND METHODS FOR MAKING THE SAME | Jan 04, 19 | Jul 11, 19 | Not available |
| 2019/0093,286 | SHEET MANUFACTURING APPARATUS | Sep 26, 18 | Mar 28, 19 | SEIKO EPSON CORPORATION |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 27 Months (last 2 years Issuances)
- 27 Months (last 5 years Issuances)