Description
Class C08B : POLYSACCHARIDES; DERIVATIVES THEREOF
Subclass 3/16: Preparation of cellulose esters of organic acids Preparation of mixed organic cellulose esters
C08B 3/16
Sub-Class
Stats
- 92 US PATENTS IN FORCE
- 24 US APPLICATIONS PENDING
- 20 Total Patent Owners
- 246 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12139560 | Cellulose resin, molding material, molded body, and method for producing cellulose resin | Feb 14, 19 | Nov 12, 24 | NEC Corporation |
| 12006375 | Regioselectively substituted cellulose esters | Oct 13, 22 | Jun 11, 24 | Eastman Chemical Company |
| 12006376 | Regioselectively substituted cellulose esters and films made therefrom | Mar 27, 23 | Jun 11, 24 | Eastman Chemical Company |
| 11976138 | Thermally stable cellulose ester compositions and articles made using these compositions | Nov 09, 17 | May 07, 24 | Eastman Chemical Company |
| 11939407 | Regioselectively substituted cellulose esters | Jan 26, 23 | Mar 26, 24 | Eastman Chemical Company |
| 11905342 | NCC films and products based thereon | Apr 26, 21 | Feb 20, 24 | Melodea Ltd. |
| 11873351 | Hydroxypropyl methyl cellulose phthalate and method for producing the same | Oct 29, 20 | Jan 16, 24 | Shin-Etsu Chemical Co., Ltd. |
| 11767371 | Hydroxypropyl methyl cellulose acetate succinate, method for producing the same, and composition for hot-melt extrusion | Sep 24, 21 | Sep 26, 23 | Shin-Etsu Chemical Co., Ltd. |
| 11753483 | Hydroxypropyl methyl cellulose acetate succinate and method for producing the same | Oct 29, 20 | Sep 12, 23 | Shin-Etsu Chemical Co., Ltd. |
| 11655309 | Polymer-based resin compositions derived from cellulose and articles made using these compositions | Nov 09, 17 | May 23, 23 | Eastman Chemical Company |
| 11591410 | Cellulose derivative and resin composition for molding | Apr 24, 15 | Feb 28, 23 | NEC Corporation |
| 11591411 | Regioselectively substituted cellulose esters | Mar 28, 18 | Feb 28, 23 | Eastman Chemical Company |
| 11572416 | Cellulose resin, molding material, molded body, and method for producing cellulose resin | May 31, 18 | Feb 07, 23 | NEC Corporation |
| 11505622 | Regioselectively substituted cellulose esters | Mar 28, 18 | Nov 22, 22 | Eastman Chemical Company |
| 11319385 | Method for producing hypromellose acetate succinate | Jul 24, 19 | May 03, 22 | Shin-Etsu Chemical Co. Ltd. |
| 11161917 | Method for producing cellulose derivative, and cellulose derivative | Oct 15, 18 | Nov 02, 21 | NEC Corporation |
| 11149133 | Cellulose resin composition, molded body and product using same | Jun 15, 17 | Oct 19, 21 | NEC Corporation |
| 11136414 | Regioselectively substituted cellulose esters | Mar 28, 18 | Oct 05, 21 | Eastman Chemical Company |
| 11034776 | Regioselectively substituted cellulose esters and films made therefrom | Mar 27, 20 | Jun 15, 21 | Eastman Chemical Company |
| 11028186 | Cellulose derivative, cellulose resin composition, molded body and product using same | Jun 15, 17 | Jun 08, 21 | NEC Corporation |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0051,482 | Biodegradable Microbeads from Mixed Cellulose Esters | Nov 11, 22 | Feb 13, 25 | Eastman Chemical Company |
| 2025/0034,284 | HYDROXYPROPYL METHYLCELLULOSE ACETATE SUCCINATE POWDER, AND METHOD OF PRODUCING THE SAME | Jul 25, 24 | Jan 30, 25 | Not available |
| 2025/0034,285 | METHOD OF PRODUCING HYDROXYPROPYL METHYLCELLULOSE ACETATE SUCCINATE POWDER | Jul 25, 24 | Jan 30, 25 | Not available |
| 2025/0002,612 | Freshwater Biodegradable Mixed Ester Cellulose Esters | Nov 11, 22 | Jan 02, 25 | Eastman Chemical Company |
| 2025/0002,611 | Freshwater Biodegradable Mixed Ester Cellulose Esters | Nov 11, 22 | Jan 02, 25 | Eastman Chemical Company |
| 2024/0243,287 | NEGATIVE ELECTRODE ACTIVE MATERIAL MODIFIED BY ZWITTERIONIC POLYMER, AND PREPARATION METHOD AND APPLICATIONS THEREOF | Aug 21, 23 | Jul 18, 24 | Not available |
| 2023/0365,719 | HYDROXYPROPYL METHYL CELLULOSE ACETATE SUCCINATE, METHOD FOR PRODUCING THE SAME, AND COMPOSITION FOR HOT-MELT EXTRUSION | Jul 19, 23 | Nov 16, 23 | Not available |
| 2023/0340,162 | METHOD FOR PRODUCING HYDROXYPROPYL METHYLCELLULOSE ACETATE SUCCINATE | Apr 18, 23 | Oct 26, 23 | Not available |
| 2023/0167,201 | REGIOSELECTIVELY SUBSTITUTED CELLULOSE ESTERS | Jan 26, 23 | Jun 01, 23 | Eastman Chemical Company |
| 2022/0235,149 | REGIOSELECTIVELY SUBSTITUTED CELLULOSE ESTERS AND FILMS MADE THEREFROM | May 04, 21 | Jul 28, 22 | Eastman Chemical Company |
| 2021/0139,611 | CELLULOSE ESTER AND MOLDED ARTICLE THEREOF | Jan 20, 21 | May 13, 21 | Daicel Corporation Industries Ltd. |
| 2020/0270,368 | CELLULOSE MIXED ESTER AND MOLDED ARTICLE OF SAME | Aug 22, 18 | Aug 27, 20 | DAICEL CORPORATION |
| 2020/0055,960 | CELLULOSE ESTER OPTICAL FILMS | Oct 28, 19 | Feb 20, 20 | Eastman Chemical Company |
| 2020/0040,108 | PROCESS FOR MAKING A CONSUMER PRODUCT COMPRISING MODIFIED POLYSACCHARIDES | Jul 30, 19 | Feb 06, 20 | Not available |
| 2020/0017,606 | REGIOSELECTIVELY SUBSTITUTED CELLULOSE ESTERS | Mar 28, 18 | Jan 16, 20 | Eastman Chemical Company |
| 2019/0330,450 | CELLULOSE RESIN COMPOSITION, MOLDED BODY AND PRODUCT USING SAME | Jun 15, 17 | Oct 31, 19 | NEC Corporation |
| 2019/0161,557 | CELLULOSE ESTER AND MOLDED ARTICLE THEREOF | Apr 04, 17 | May 30, 19 | DAICEL CORPORATION |
| 2019/0048,099 | METHOD FOR PRODUCING CELLULOSE DERIVATIVE, AND CELLULOSE DERIVATIVE | Oct 15, 18 | Feb 14, 19 | NEC Corporation |
| 2019/0010,251 | CELLULOSE RESIN, MATERIAL FOR MOLDING, MOLDED BODY AND PROCESS FOR PRODUCING CELLULOSE RESIN | Dec 09, 16 | Jan 10, 19 | NEC Corporation |
| 2018/0355,066 | PROCESS FOR PRODUCING CELLULOSE DERIVATIVE AND CELLULOSE DERIVATIVE | Jun 11, 18 | Dec 13, 18 | NEC Corporation |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 33 Months (last 2 years Issuances)
- 33 Months (last 5 years Issuances)