Class 159: CONCENTRATING EVAPORATORS ( Manual of U.S. Patent Classification )

U.S. PATENT AND TRADEMARK OFFICE
Information Products Division

[Manual of Classification, Class Listing]

Manual of U.S. Patent Classification
as of June 30, 2000

Class
159
CONCENTRATING EVAPORATORS

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Subclass		Title
ClassTitle		===> CONCENTRATING EVAPORATORS

2.1		SUPERHEATING AND PRESSURE RELEASE
2.2		. With extruder
2.3		. . Multistage
3		SPRAY TYPE
4.01		. Gaseous current
4.02		. . Combustion product gas
4.03		. . Antibridging
4.04		. . Countercurrent
4.05		. . Intermediate gas outlet or inlet
4.06		. . Bottom sprayer
4.07		. . Horizontial sprayer
4.08		. . Impinging jets
4.09		. . Multistaging
4.1		. . Heat recovery
4.2		. . Spinning sprayer
4.3		. . Rotary drum with sprayer
4.4		. . Steam drying or atomizing
5		FILM TYPE
6.1		. Centrifugal
6.2		. . Wiped film
6.3		. . . Horizontally
7		. Moving-film support
8		. . Gaseous current
9.1		. . . Rotary drum or disk
9.2		. . . . Treated material inside drum
10		. . . . Exterior surface
11.1		. Rotary drum or disk
11.2		. . Internal film
11.3		. . . Rotary disk
12		. . Inclosing chamber
13.1		. Moving film
13.2		. . Contacting tube
13.3		. . . Outside of tube
13.4		. . With gas wiping
14		. . Climbing
15		. . Zigzag
16.1		GASEOUS BLAST OR CURRENT
16.2		. Submerged combustion
16.3		. Steam injection
17.1		MULTIPLE EFFECTS
17.2		. Parallel fluid flow
17.3		. Variant multistaging
17.4		. Contiguous evaporators
18		. Superimposed
19		. Combined closed and open
20.1		. Variable or counterflow
20.2		. . With effect switching means
21		COMBINED CLOSED AND OPEN PANS
22		CLOSED EVAPORATING CHAMBERS
23		. Indirectly heated
24.1		. . Regenerative
24.2		. . . Heat recovery or regeneration
24.3		. . . . Thermocompression
25.1		. . Rotatable agitator or coil
25.2		. . . Vertical axis agitator
26.1		. . Heated tube
26.2		. . . Inclined
27.1		. . . Vertical
27.2		. . . . Detached separator
27.3		. . . . Multieffect in one casing
27.4		. . . . Downflow
27.5		. . . . Floating calandria
28.1		. . Heating elements
28.2		. . . Baffled
28.3		. . . Spur tubes
28.4		. . . Coils
28.5		. . . Tubular inserts
28.6		. . . Plate-type evaporator
29		. Directly heated
30		. Samplers
31		. Liquid traps or separators
32		OPEN PANS
33		. With rakes
34		. Tiltable, removable, or portable
35		. Interposed liquid receptacle
36		. Steam and furnace heated
37		. Steam heated
38		. Furnace heated
39		. . Liquid tubes in flue
40		. . Flues in pan
41		. . With dampers
42		STRAINERS OR SKIMMERS
43.1		FLUID FEED OR DISCHARGE DEVICES
43.2		. With alternating operating means
44		. Automatic
45		APPARATUS FOR GRAINING AND SEPARATING CRYSTALS
46		PRELIMINARY HEATERS AND HEAT ECONOMIZERS
47.1		PROCESSES
47.2		. Involving urea
47.3		. Involving waste liquid
48.1		. Spraying
48.2		. . Producing liquid product
49		. Film
1.1		MISCELLANEOUS
		******************************
		CROSS-REFERENCE ART COLLECTIONS
		******************************
900		USING VIBRATORY FORCE
901		PROMOTING CIRCULATION
902		USING NATURAL HEAT
903		. Solar
904		. . Floating solar still
905		SEWAGE TREATMENT
906		WICK
		******************************
		DIGESTS
		******************************
DIG 1		Electric heat
DIG 2		Entrainment
DIG 3		Fluidized bed
DIG 4		Foam
DIG 5		Freezing
DIG 6		Infrared
DIG 7		Magnetic coupling
DIG 8		Multieffect or multistage
DIG 9		Two liquids dried simultaneously
DIG 10		Organic
DIG 11		Biologicals
DIG 12		Radioactive
DIG 13		Scale
DIG 14		Soap
DIG 15		Special material
DIG 16		Vacuum
DIG 17		Two liquids
DIG 18		Accumulator
DIG 19		Acid
DIG 20		Additive
DIG 21		Coating
DIG 22		Condensate flashing
DIG 23		Cooling
DIG 24		Critical
DIG 25		Decant, press, centrifuge
DIG 26		Electric field
DIG 27		Micropores
DIG 28		Porous member
DIG 29		Pebble bed
DIG 30		Desuper heating
DIG 31		Deaeration
DIG 32		Indirect heat exchange
DIG 33		Two liquids, one a heat carrier
DIG 34		Caustic
DIG 35		Viewports, peepsights, and sightglasses
DIG 36		Rabbled hearth
DIG 37		Ported
DIG 38		Seed
DIG 39		Power plant
DIG 40		Pumps
DIG 41		Removable units
DIG 42		Seals

Information Products Division -- Contacts

Questions regarding this report should be directed to:

U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231
tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov

Last Modified: 6 October 2000

Manual of U.S. Patent Classification as of June 30, 2000

Class 159 CONCENTRATING EVAPORATORS

Manual of U.S. Patent Classification
as of June 30, 2000

Class
159
CONCENTRATING EVAPORATORS