B01D
Separation
Official title: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
B01D (Separation) appears on 116,378 US grants and 108,013 published applications in this corpus.
Search patents in B01D- Granted patents
- 116,378
- Published applications
- 108,013
- Assignees
- 32,202
- Inventors
- 190,730
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1395 | 0 |
| 1977 | 1304 | 0 |
| 1978 | 1316 | 0 |
| 1979 | 1038 | 0 |
| 1980 | 1349 | 0 |
| 1981 | 1520 | 0 |
| 1982 | 1289 | 0 |
| 1983 | 1157 | 0 |
| 1984 | 1207 | 0 |
| 1985 | 1263 | 0 |
| 1986 | 1165 | 0 |
| 1987 | 1366 | 0 |
| 1988 | 1457 | 0 |
| 1989 | 1711 | 0 |
| 1990 | 1627 | 0 |
| 1991 | 1620 | 0 |
| 1992 | 1929 | 0 |
| 1993 | 1877 | 0 |
| 1994 | 1570 | 0 |
| 1995 | 1684 | 0 |
| 1996 | 1700 | 0 |
| 1997 | 1882 | 0 |
| 1998 | 2190 | 0 |
| 1999 | 2180 | 0 |
| 2000 | 2102 | 0 |
| 2001 | 2217 | 660 |
| 2002 | 2111 | 2159 |
| 2003 | 2102 | 2690 |
| 2004 | 1824 | 3155 |
| 2005 | 1657 | 2941 |
| 2006 | 1641 | 3057 |
| 2007 | 1545 | 2959 |
| 2008 | 1655 | 3076 |
| 2009 | 1693 | 3570 |
| 2010 | 2299 | 3986 |
| 2011 | 2474 | 3901 |
| 2012 | 2683 | 3952 |
| 2013 | 3009 | 4411 |
| 2014 | 3158 | 4762 |
| 2015 | 3401 | 5155 |
| 2016 | 3492 | 4969 |
| 2017 | 3853 | 5233 |
| 2018 | 4018 | 5545 |
| 2019 | 4858 | 5684 |
| 2020 | 4927 | 5858 |
| 2021 | 4428 | 5666 |
| 2022 | 4192 | 5666 |
| 2023 | 3935 | 5259 |
| 2024 | 3930 | 5315 |
| 2025 | 3825 | 4771 |
| 2026 | 2553 | 3613 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- B01D 53/00Separation of gases or vapours36,511
- B01D 2257/00Components to be removedIndexing code14,556
- B01D 46/00Filters or filtering processes specially modified for separating dispersed particles from gases13,014
- B01D 61/00Processes of separation using semi-permeable membranes9,860
- B01D 29/00Filters with filtering elements stationary during filtration8,777
- B01D 71/00Semi-permeable membranes for separation processes or apparatus characterised by the material7,891
- B01D 2259/00Type of treatmentIndexing code7,455
- B01D 35/00Filtering devices having features not specifically covered by groups b01d24/00 - b01d33/007,091
All 67 main groupsShow fewer
- B01D 3/00Distillation or related exchange processes in which liquids are contacted with gaseous7,073
- B01D 2253/00Adsorbents used in seperation treatment of gases and vapoursIndexing code7,010
- B01D 15/00Separating processes involving the treatment of liquids with solid sorbents6,799
- B01D 2201/00Details relating to filtering apparatusIndexing code6,775
- B01D 69/00Semi-permeable membranes for separation processes or apparatus characterised by their form, structure6,687
- B01D 2258/00Sources of waste gasesIndexing code6,681
- B01D 67/00Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus5,636
- B01D 2255/00CatalystsIndexing code5,634
- B01D 39/00Filtering material for liquid or gaseous fluids5,566
- B01D 63/00Apparatus in general for separation processes using semi-permeable membranes5,456
- B01D 21/00Separation of suspended solid particles from liquids by sedimentation5,365
- B01D 17/00Separation of liquids, not provided for elsewhere5,003
- B01D 2251/00ReactantsIndexing code4,679
- B01D 2256/00Main component in the product gas stream after treatmentIndexing code4,594
- B01D 19/00Degasification of liquids4,544
- B01D 2325/00Details relating to properties of membranesIndexing code4,461
- B01D 2313/00Details relating to membrane modules or apparatusIndexing code4,002
- B01D 45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal3,895
- B01D 2323/00Details relating to membrane preparationIndexing code3,760
- B01D 1/00Evaporating3,705
- B01D 11/00Solvent extraction3,426
- B01D 2279/00Filters adapted for separating dispersed particles from gases or vapours specially modifiedIndexing code3,254
- B01D 65/00Accessories or auxiliary operations, in general, for separation processes or apparatus using3,106
- B01D 2239/00Aspects relating to filtering material for liquid or gaseous fluidsIndexing code2,899
- B01D 2311/00Details relating to membrane separation process operations and controlIndexing code2,760
- B01D 5/00Condensation of vapours2,594
- B01D 2252/00Absorbents, i.e. solvents and liquid materials for gas absorptionIndexing code2,365
- B01D 33/00Filters with filtering elements which move during the filtering operation2,292
- B01D 2265/00Casings, housings or mounting for filters specially adapted for separating dispersed particlesIndexing code1,986
- B01D 2321/00Details relating to membrane cleaning, regeneration, sterilization or to the prevention ofIndexing code1,918
- B01D 50/00Combinations of methods or devices for separating particles from gases or vapours1,891
- B01D 36/00Filter circuits or combinations of filters with other separating devices1,712
- B01D 47/00Separating dispersed particles from gases, air or vapours by liquid as separating1,689
- B01D 2275/00Filter media structures for filters specially adapted for separating dispersed particles fromIndexing code1,581
- B01D 24/00Filters comprising loose filtering material, i.e. filtering material without any binder between1,383
- B01D 9/00Crystallisation1,380
- B01D 2271/00Sealings for filters specially adapted for separating dispersed particles from gases orIndexing code1,354
- B01D 2315/00Details relating to the membrane module operationIndexing code1,321
- B01D 2273/00Operation of filters specially adapted for separating dispersed particles from gases orIndexing code1,318
- B01D 2221/00Applications of separation devicesIndexing code1,294
- B01D 37/00Processes of filtration1,258
- B01D 27/00Cartridge filters of the throw-away type1,096
- B01D 2317/00Membrane module arrangements within a plant or an apparatusIndexing code832
- B01D 59/00Separation of different isotopes of the same chemical element806
- B01D 25/00Filters formed by clamping together several filtering elements or parts of such796
- B01D 57/00Separation, other than separation of solids, not fully covered by a single650
- B01D 2319/00Membrane assemblies within one housingIndexing code512
- B01D 2267/00Multiple filter elements specially adapted for separating dispersed particles from gases orIndexing code465
- B01D 41/00Regeneration of the filtering material or filter elements outside the filter for290
- B01D 51/00Auxiliary pretreatment of gases or vapours to be cleaned282
- B01D 43/00Separating particles from liquids, or liquids from solids, otherwise than by sedimentation259
- B01D 2247/00Details relating to the separation of dispersed particles from gases, air orIndexing code248
- B01D 8/00Cold traps239
- B01D 12/00Displacing liquid215
- B01D 7/00Sublimation208
- B01D 49/00Separating dispersed particles from gases, air or vapours by other methods139
- B01D 2101/00Types of filters having loose filtering materialIndexing code137
- B01D 2277/00Filters specially adapted for separating dispersed particles from gases or vapours characterisedIndexing code107
- B01D 2202/00Details concerning evaporation, distillation or condensationIndexing code17
Recent patents
- Control center box and flexible bathtub6 Oct 2026US 12,751,582 B2Jiaxing Virpol Sanitary Ware co., LTD.
- Air filtration apparatus and system for providing patient information6 Oct 2026US 12,752,071 B2ResMed Pty Ltd
- Filter unit with a filter block, a damping layer and a housing, and process of manufacturing such a filter unit6 Oct 2026US 12,752,136 B2Dräger Safety AG & Co. KGaA
- Evaporator and separation method using the same6 Oct 2026US 12,752,215 B2Hanwha Solutions Corporation
- Heat integration via heat pump on bottom dividing wall column6 Oct 2026US 12,752,216 B2Sulzer Management AG
- Animal watering system8 Oct 2026US 2026/0305570 A1Aborder Products, Inc.
- Concentrated milk protein preparations8 Oct 2026US 2026/0305634 A150G Inc.
- Multifunctional filter materials8 Oct 2026US 2026/0305741 A1Khalifa University of Science and Technology
- Hair dryer and hair dryer operation mode selection system8 Oct 2026US 2026/0305789 A1Omachron Intellectual Property Inc.
- User-prompted cleaning by autonomous vacuum8 Oct 2026US 2026/0305895 A1Matic Robots, Inc. (fka Matician, Inc.)
Most cited
By later US patents
- Process for producing porous products1,316US 3,953,566 AW. L. Gore & Associates, Inc. · 1976
- Treating hydrophobic filters to render them hydrophilic1,164US 4,525,374 AManresa, Inc. · 1985
- Multichain polypeptides or proteins and processes for their production1,110US 4,816,397 ACelltech Limited · 1989
- Mesoscale polynucleotide amplification devices1,091US 5,587,128 AThe Trustees of the University of Pennsylvania · 1996
- Robust system for screening mail for biological agents1,080US 6,887,710 B2MesoSystems Technology, Inc. · 2005