Description
Class C02F : TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Subclass 1/24: Treatment of water, waste water, or sewage (C02F 3/00-C02F 9/00 take precedence) by flotation (C02F 1/465 takes precedence)
C02F 1/24
Sub-Class
Stats
- 545 US PATENTS IN FORCE
- 103 US APPLICATIONS PENDING
- 196 Total Patent Owners
- 1,585 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12264302 | Process to improve protein recovery in stillage processing streams | Feb 03, 21 | Apr 01, 25 | ECOLAB USA INC. |
| 12252424 | Method and device for anaerobic digestion | Dec 24, 19 | Mar 18, 25 | Orege |
| 12247354 | Method for suppressing sedimentation of suspended substance, method for suppressing pitch trouble, and method for detecting sedimentation of suspended substance | Sep 10, 20 | Mar 11, 25 | Kurita Water Industries LTD |
| 12246975 | Carbon sequestration systems in conjunction with oil and gas operations | Nov 13, 23 | Mar 11, 25 | HYDROZONIX, LLC |
| 12246978 | Water treatment system and method | Nov 19, 20 | Mar 11, 25 | Hyperion Water Technologies LLC |
| 12240000 | Iron chelators as activators in alkaline flotation circuits | Jul 03, 19 | Mar 04, 25 | BASF SE |
| 12226750 | Nanonets for removal of contaminants from aqueous solutions, kits therefor and methods of their use | Dec 03, 19 | Feb 18, 25 | CARBONET NANOTECHNOLOGIES INC. |
| 12202756 | Method and system for controlling hydrophobic conditions and fouling in water intensive processes | Dec 04, 23 | Jan 21, 25 | Kemira Oyj |
| 12195377 | Processes and apparatus for reducing concentration of PFAS contamination in wastewater and/or soil | Nov 26, 21 | Jan 14, 25 | EGL WATER PTY LTD |
| 12187624 | Method of acylating amino acids and uses of N-acyl amino acid products | Feb 18, 20 | Jan 07, 25 | NewSouth Innovations Pty Limited |
| 12172920 | Dissolved air flotation system and methods for biological nutrient removal | Mar 25, 22 | Dec 24, 24 | Evoqua Water Technologies LLC |
| 12172907 | Modular installation for treating water by flotation | Feb 13, 20 | Dec 24, 24 | VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT |
| 12151185 | Device and method for controlling diffusion of MPs carried with ARGs in waste water treatment system | Jun 14, 24 | Nov 26, 24 | Nanjing Institute of Environmental Sciences, MEE |
| 12151960 | Wastewater treatment system and methods utilizing chemical pre-treatment and foam fractionation | Nov 07, 22 | Nov 26, 24 | AQUA-TERRA CONSULTANTS |
| 12139420 | Method and apparatus for separation of a substance from water | Dec 10, 18 | Nov 12, 24 | OPEC Remediation Technologies Pty Limited |
| 12138638 | Composition and method for use of 1-alkyl-5-oxopyrrolidine-3-carboxylic acids as collectors for phosphate and lithium flotation | Sep 09, 21 | Nov 12, 24 | CLARIANT INTERNATIONAL LTD |
| 12134575 | Treatment method and device for dehydration of organic sludges | May 29, 19 | Nov 05, 24 | Orege |
| 12122701 | Gasification and Fischer-Tropsch process waste water treatment | Mar 16, 21 | Oct 22, 24 | Velocys Technologies Limited |
| 12116290 | Systems and methods for removal of contaminants from a liquid | Jul 03, 20 | Oct 15, 24 | BLUE WHALE OCEAN FILTRATION LLC |
| 12110246 | Ion removal system | Feb 10, 20 | Oct 08, 24 | Panasonic Intellectual Property Management Co., Ltd. |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0115,504 | SYSTEM FOR TREATING PRODUCED WATER RESULTING FROM OIL EXTRACTION AND PNEUMATIC FLOCCULATION METHOD BY INJECTION OF INERT GAS INTO HEAT EXCHANGERS | Oct 07, 24 | Apr 10, 25 | Not available |
| 2025/0091,919 | METHOD AND SYSTEM FOR WATER TREATMENT USING MODIFIED ADVANCED OXIDIZING TECHNOLOGY | Jan 19, 22 | Mar 20, 25 | Not available |
| 2025/0073,673 | NANONETS FOR REMOVAL OF CONTAMINANTS FROM AQUEOUS SOLUTIONS, KITS THEREFOR AND METHODS OF THEIR USE | Aug 20, 24 | Mar 06, 25 | Not available |
| 2025/0074,799 | COMPOSITIONS AND METHODS FOR REMOVING METALS FROM MEDIUMS | Aug 28, 24 | Mar 06, 25 | ECOLAB USA INC. |
| 2025/0066,232 | MULTI-STAGE WASHER INCLUDING A WATER TREATMENT SYSTEM | Aug 09, 24 | Feb 27, 25 | Stolle Machinery Company, LLC |
| 2025/0058,250 | Concentric Sloping Plate Enhanced Vertical Compact Flotation Unit | May 31, 24 | Feb 20, 25 | Not available |
| 2025/0051,186 | APPARATUS AND METHOD FOR SEPARATING PARTICLES FROM WASTE FLUID USING OXYGEN ENRICHED AIR | Aug 10, 23 | Feb 13, 25 | DHI - DALBO HOLDINGS, INC. & SUBSIDIARIES |
| 2024/0425,398 | Biofilm Carrier Media in Moving Bed Biofilm Reactor Processes | Sep 03, 24 | Dec 26, 24 | Not available |
| 2024/0417,283 | WATER TREATMENT DEVICE BASED ON MICRO-NANO BUBBLE TECHNOLOGY | Dec 07, 23 | Dec 19, 24 | Chongqing Academy of Eco-environmental sciences; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences; |
| 2024/0400,416 | SYSTEMS AND METHODS FOR UTILIZING FOAM FRACTIONATION TO SEPARATE AND ELIMINATE PFAS | Apr 22, 24 | Dec 05, 24 | Battelle Memorial Institute |
| 2024/0400,418 | SYSTEMS AND METHODS FOR FOAM FRACTIONATION WITH GAS | Apr 30, 24 | Dec 05, 24 | Batelle Memorial Institute |
| 2024/0400,424 | SYSTEMS AND METHODS FOR TREATMENT OF CONTAMINATED FOAM STREAMS USING REACTIVE METAL OXIDES | May 31, 24 | Dec 05, 24 | Batelle Memorial Institute |
| 2024/0400,417 | SYSTEMS AND METHODS FOR TREATMENT OF CONTAMINATED FOAM STREAMS USING SURFACTANTS | Apr 30, 24 | Dec 05, 24 | Batelle Memorial Institute |
| 2024/0391,799 | SYSTEMS AND METHODS FOR SEPARATION OF RARE EARTH ELEMENTS USING AIR FLOTATION | May 22, 24 | Nov 28, 24 | Batelle Memorial Institute |
| 2024/0383,777 | SORBENT-BASED SYSTEMS AND METHODS FOR REDUCING A CONCENTRATION OF A METAL FROM A FLUID | Mar 11, 24 | Nov 21, 24 | Not available |
| 2024/0367,073 | SYSTEM FOR CLARIFYING PROCESS WATER IN OIL AND GAS OPERATIONS | Apr 30, 24 | Nov 07, 24 | Redhawk Coil Tubing |
| 2024/0367,180 | INCREASING FLOTATION RECOVERY AND THROUGHPUT | Sep 16, 22 | Nov 07, 24 | Not available |
| 2024/0360,008 | SYSTEM FOR REMOVING PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS) FROM A SOLUTION HAVING PFAS THEREIN USING FOAM FRACTIONATION | Apr 26, 24 | Oct 31, 24 | Not available |
| 2024/0360,019 | DAIRY WASTEWATER TREATMENT SYSTEM AND METHOD | Jul 11, 24 | Oct 31, 24 | Shamrock Foods Company |
| 2024/0351,932 | WATER PURIFICATION SYSTEM | Jun 28, 24 | Oct 24, 24 | Blue Safety Hygienetechnologie GmbH |
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)