Description
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
D21C
Technology
Sub-Class
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- 21 975 US PATENTS IN FORCE
- 155 US APPLICATIONS PENDING
- 1147 Total Patent Owners
- 4834 TOTAL INVENTORS
Subclasses
| Subclass | Title |
|---|---|
| 1/00 | Pretreatment of the finely-divided materials before digesting (of waste paper D21C 5/02) |
| 1/02 | Pretreatment of the finely-divided materials before digesting (of waste paper D21C 5/02) with water or steam |
| 1/04 | Pretreatment of the finely-divided materials before digesting (of waste paper D21C 5/02) with acid reacting compounds |
| 1/06 | Pretreatment of the finely-divided materials before digesting (of waste paper D21C 5/02) with alkaline reacting compounds |
| 1/08 | Pretreatment of the finely-divided materials before digesting (of waste paper D21C 5/02) with oxygen-generating compounds |
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 9,121,134 | Process for production of oxidised cellulose pulp | Jan 18, 11 | Sep 01, 15 | SODRA SKOGSAGARNA EKONOMISK FORENING |
| 9,121,135 | Use of sodium dithionite in pulping | Dec 12, 13 | Sep 01, 15 | BASF SE |
| 9,115,467 | Methods and systems for solvent purification | Aug 01, 11 | Aug 25, 15 | HCL CLEANTECH LTD., |
| 9,115,468 | Chemical treatment of lignocellulosic fiber bundle material, and methods and systems relating thereto | Sep 27, 13 | Aug 25, 15 | ANDRITZ INC. |
| 9,109,329 | Lignin dewatering process | Dec 23, 13 | Aug 18, 15 | |
| 9,102,533 | Method of recovering chemicals | Feb 28, 12 | Aug 11, 15 | AALTO UNIVERSITY FOUNDATION |
| 9,102,856 | Pre-soaking process for biomass conversion | Dec 20, 12 | Aug 11, 15 | BETA RENEWABLES S.P.A. |
| 9,102,951 | Process for recovering salt during a lignocellulosic conversion process | Aug 24, 12 | Aug 11, 15 | IOGEN ENERGY CORPORATION |
| 9,102,964 | Process for treating biomass | Apr 27, 12 | Aug 11, 15 | MICHIGAN BIOTECHNOLOGY INSTITUTE |
| 9,103,069 | Method for dry spinning neutral and anionically modified cellulose and fibres made using the method | Mar 08, 12 | Aug 11, 15 | SAPPI NETHERLANDS SERVICES B.V. |
| 9,103,070 | Flash tank with adjustable inlet | Jan 23, 13 | Aug 11, 15 | ANDRITZ INC. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2015/0247,116 | Rheinheimera tangshanensis CGMCC#5972 and Its Application Thereof | Sep 16, 13 | Sep 03, 15 | BEIJING TIAN'AN BIOSCIENCE &TECHNOLOGY CO., LTD |
| 2015/0247,117 | Acinetobacter lwoffii strain, CGMCC#5973 and Its Application Thereof | Sep 16, 13 | Sep 03, 15 | BEIJING TIAN'AN BIOSCIENCE &TECHNOLOGY CO., LTD |
| 2015/0232,803 | Bacillus sp. CGMCC#5971 and Its Application Thereof | Sep 16, 13 | Aug 20, 15 | BEIJING TIAN'AN BIOSCIENCE &TECHNOLOGY CO., LTD |
| 2015/0232,804 | Wickerhamonyces anomalus CGMCC#5975 and Its Application Thereof | Sep 16, 13 | Aug 20, 15 | BEIJING TIAN'AN BIOSCIENCE &TECHNOLOGY CO., LTD |
| 2015/0233,051 | PSEUDOMONAS FLUORESCENS CGMCC#5974 AND ITS APPLICATION THEREOF | Sep 16, 13 | Aug 20, 15 | BEIJING TIAN'AN BIOSCIENCE &TECHNOLOGY CO., LTD |
| 2015/0233,056 | PURIFICATION PROCESS FOR PARTLY-HYDROLYZED CELLULOSE | Aug 21, 12 | Aug 20, 15 | NORAM ENGINEERING AND CONSTRUCTORS LTD. |
| 2015/0233,057 | LIGNIN-COATED CELLULOSE FIBERS FROM LIGNOCELLULOSIC BIOMASS | Jan 27, 15 | Aug 20, 15 | API INTELLECTUAL PROPERTY HOLDINGS, LLC |
| 2015/0225,895 | METHOD AND APPARATUS FOR OBTAINING STRONG WHITE LIQUOR AND LIME MUD WITH LOW RESIDUAL ALKALI LEVEL | Jul 09, 12 | Aug 13, 15 | VALMET AKTIEBOLAG |
| 2015/0225,896 | CONDITIONING OF SO2-ETHANOL-WATER SPENT LIQUOR FOR FERMENTATION BY CLOSTRIDIA | Apr 20, 15 | Aug 13, 15 | API INTELLECTUAL PROPERTY HOLDINGS, LLC |
| 2015/0225,901 | Method of producing dissolving pulp, dissolving pulp and use of method | Sep 16, 13 | Aug 13, 15 | TEKNOLOGIAN TUTKIMUSKESKUS VTT OY |
Top Owners in This Class
Top Owners in This Subclass
Applications Filed in This Class - By Year
Applications Filed in This Subclass - By Year
Patents Issued To Date - By Filing Year
Average Time to Issuance
- 36 Months (last 2 years Issuances)
- 36 Months (last 5 years Issuances)
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