Description
Class C02F : TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Subclass 1/22: Treatment of water, waste water, or sewage (C02F 3/00-C02F 9/00 take precedence) by freezing
C02F 1/22
Sub-Class
Stats
- 75 US PATENTS IN FORCE
- 30 US APPLICATIONS PENDING
- 34 Total Patent Owners
- 399 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12187625 | Zero liquid discharge eutectic freeze desalination with intermediate cold liquid | Nov 11, 20 | Jan 07, 25 | The Board of Regents of the University of Oklahoma |
| 12161982 | System, method and generator for generating nanobubbles or nanodroplets | Oct 15, 19 | Dec 10, 24 | UNIVERSITY COLLEGE, DUBLIN, NATIONAL UNIVERSITY OF IRELEAND, DUBLIN |
| 12110238 | Systems and methods for activating and dewatering sludge using acoustic pressure shock waves | Feb 21, 22 | Oct 08, 24 | SANUWAVE, INC. |
| 12103865 | Freezing desalination system using thermoelectric coolers | Feb 23, 24 | Oct 01, 24 | King Saud University |
| 12103866 | Systems, methods, and compositions for purifying water | May 17, 21 | Oct 01, 24 | Battelle Memorial Institute |
| 12054403 | Treatment of water | Sep 22, 20 | Aug 06, 24 | ROC WATER TECHNOLOGIES (PTY) LTD |
| 12017929 | Recrystallization water treatment system and heat-exchange devices (embodiments) for its implementation | Dec 26, 19 | Jun 25, 24 | LLC PRISTINAM |
| 11998882 | System and method for the treatment of biogas and wastewater | Oct 15, 19 | Jun 04, 24 | UNIVERSITY COLLEGE, DUBLIN, NATIONAL UNIVERSITY OF IRELEAND, DUBLIN |
| 11945743 | Desalination of salt waters by salt repellent technique | Jun 26, 20 | Apr 02, 24 | Not available |
| 11939247 | Systems and methods for removal and sequestration of acidity from surface seawater | Oct 24, 22 | Mar 26, 24 | LONE GULL HOLDINGS, LTD. |
| 11912588 | Gas hydrate desalination system | May 19, 23 | Feb 27, 24 | King Abdulaziz University |
| 11905186 | Cryo-thermal desalinator | Feb 19, 21 | Feb 20, 24 | Not available |
| 11858823 | Process to recover ammonium bicarbonate from wastewater | Jan 31, 22 | Jan 02, 24 | BION ENVIRONMENTAL TECHNOLOGIES, INC. |
| 11851349 | Controlled-type, non-decomposable, high-concentration process water freeze-separation apparatus | Dec 28, 21 | Dec 26, 23 | Yoonjin Environment Co., Ltd |
| 11820690 | Apparatus and method for treating waste water containing ammonium salts | Sep 29, 20 | Nov 21, 23 | China Petroleum & Chemical Corporation; Sinopec Catalyst Co., Ltd.; |
| 11578011 | Freeze concentration for urine-based fertilizer production | Aug 15, 19 | Feb 14, 23 | The Regents of the University of Michigan |
| 11365133 | Vacuum freezing nucleated liquid water for purifying brackish water | May 01, 19 | Jun 21, 22 | Advanced Cooling Technologies Inc. |
| 11363831 | Method and system for freezing related separation processes utilizing biogenic ice nucleation proteins | Feb 14, 19 | Jun 21, 22 | Rutgers The State University Of New Jersey |
| 11358878 | Systems and methods for separating soluble solutions | Nov 14, 17 | Jun 14, 22 | Not available |
| 11279631 | Purifying aqueous mixtures derived from hydrocarbon production processes | Dec 03, 13 | Mar 22, 22 | EFC Solutions Inc. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0074,790 | ZERO LIQUID DISCHARGE EUTECTIC FREEZE DESALINATION WITH INTERMEDIATE COLD LIQUID | Nov 14, 24 | Mar 06, 25 | The Board of Regents of the University of Oklahoma |
| 2025/0074,806 | PRODUCED WATER DESALINATION WITH FRACTIONAL FREEZE CYCLES | Aug 28, 24 | Mar 06, 25 | Not available |
| 2025/0059,067 | Systems, Methods, and Compositions for Purifying Water | Aug 30, 24 | Feb 20, 25 | Battelle Memorial lnstitute |
| 2025/0042,774 | Passive Freezing Desalination Driven By Radiative Cooling | Apr 27, 23 | Feb 06, 25 | The Regents of the University of California |
| 2025/0019,263 | SEPARATING IONS IN WATER USING PLASTIC ICE VII | Jul 14, 23 | Jan 16, 25 | Not available |
| 2024/0425,387 | METHOD AND DEVICE FOR DESALINATING WATER | Nov 16, 22 | Dec 26, 24 | SEANERGY |
| 2024/0383,765 | PROCESS TO RECOVER AMMONIUM BICARBONATE FROM WASTEWATER | Dec 20, 23 | Nov 21, 24 | BION ENVIRONMENTAL TECHNOLOGIES, INC. |
| 2024/0254,020 | SYSTEMS AND METHODS FOR REMOVAL AND SEQUESTRATION OF ACIDITY FROM SURFACE SEAWATER | Mar 18, 24 | Aug 01, 24 | LONE GULL HOLDINGS, LTD. |
| 2024/0157,312 | SYSTEM AND METHOD FOR THE TREATMENT OF BIOGAS AND WASTEWATER | Jan 24, 24 | May 16, 24 | Not available |
| 2024/0124,327 | System and Method of Distilling/Desalinating Water in a Vacuum-Applied Centrifugal Multi-Phase Manner | Oct 17, 23 | Apr 18, 24 | Not available |
| 2024/0116,010 | A SYSTEM, METHOD AND GENERATOR FOR GENERATING NANOBUBBLES OR NANODROPLETS AT AMBIENT CONDITIONS | Apr 21, 20 | Apr 11, 24 | Not available |
| 2024/0083,776 | INTEGRATED THERMOACOUSTIC FREEZE DESALINATION SYSTEMS AND PROCESSES | Feb 18, 22 | Mar 14, 24 | Not available |
| 2024/0051,846 | HEAT EXCHANGER CAPABLE OF COOLING COOLANT OF EXTERNAL PLANT AND SEWAGE TREATMENT DEVICE COMPRISING SAME | Oct 26, 23 | Feb 15, 24 | BKT CO., LTD. |
| 2023/0382,768 | PURIFICATION METHOD FOR LANDFILL LEACHATE | Oct 25, 21 | Nov 30, 23 | Not available |
| 2023/0202,872 | METHOD AND APPARATUS FOR TREATING WASTEWATER USING NON-CHEMICAL PROCESS | Feb 17, 23 | Jun 29, 23 | The Research Foundation for the State University of New York |
| 2023/0002,250 | PROCESS FOR CONTROLLING OF THE TREATMENT OF WASTE FLUID GENERATED DURING A PETROCHEMICAL PROCESS USING AN INCINERATOR | Dec 14, 20 | Jan 05, 23 | Not available |
| 2022/0411,290 | PELLET MANUFACTURING APPARATUS AND WATER TREATMENT METHOD USING SAME | Jul 07, 20 | Dec 29, 22 | Not available |
| 2022/0371,918 | APPARATUS AND METHOD FOR CONTINUOUS SEPARATION OF SOLID PARTICLES FROM SOLID-LIQUID SLURRIES | May 20, 22 | Nov 24, 22 | The Board of Regents of the University of Oklahoma |
| 2022/0267,173 | SYSTEMS AND METHODS FOR SEPARATING SOLUBLE SOLUTIONS | May 12, 22 | Aug 25, 22 | Not available |
| 2021/0261,438 | Cryo-Thermal Desalinator | Feb 19, 21 | Aug 26, 21 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 28 Months (last 2 years Issuances)
- 28 Months (last 5 years Issuances)