Description
Class C10C : WORKING-UP TAR, PITCH, ASPHALT, BITUMEN; PYROLIGNEOUS ACID
Subclass 1/16: Working-up tar (obtaining hydrocarbon oils C10G ) by distillation Winning of pitch
C10C 1/16
Sub-Class
Stats
- 4 US PATENTS IN FORCE
- 2 US APPLICATIONS PENDING
- 4 Total Patent Owners
- 24 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11248172 | Heat treatment process and system for increased pitch yields | Jul 23, 19 | Feb 15, 22 | Koppers Delaware, Inc. |
| 9994775 | Process for producing mesophase pitch by hydrogenation of high-temperature coal tar | Apr 06, 12 | Jun 12, 18 | ECO ENVIRONMENTAL ENERGY RESEARCH INSTITUTE LIMITED; Dalian University of Technology; |
| 9243187 | Process for the production of pitch | May 27, 11 | Jan 26, 16 | Petroleo Brasileiro S.A.—Petrobras, CTEX - CENTRO TECNOLOGICO DE EXERCITO, |
| 9187698 | Falling film reactor for light tar oxidation | Nov 11, 11 | Nov 17, 15 | GRAFTECH INTERNATIONAL HOLDINGS INC., JPMORGAN CHASE BANK, N.A., |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2023/0272,285 | HEAT TREATMENT PRODUCT BY PROCESS FOR INCREASED PITCH YIELDS | Feb 28, 23 | Aug 31, 23 | Koppers Delaware, Inc. |
| 2022/0177,784 | Heat Treatment Process and System for Increased Pitch Yields | Dec 17, 21 | Jun 09, 22 | Koppers Delaware, Inc. |
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)