|  | B |
SECTION B — PERFORMING OPERATIONS; TRANSPORTING

|  | B01 - B07 |
Subsection index
LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION |
Method |
General operations | B01D
by centrifugal force, using centrifuges or free-vortex apparatus | B01D
using magnetic or electrostatic effect | B03C
Apparatus |
General operations | B01D
by centrifugal force, using centrifuges or free-vortex apparatus | B04B, B04C
using magnetic or electrostatic effect | B03C
SOLID/LIQUID OR SOLID/GAS SEPARATION |
Method |
General operations | B01D
by centrifugal force | B01D
using centrifuges or free-vortex apparatus | B01D
using magnetic or electrostatic effect | B03C
Apparatus |
General operations | B01D
by centrifugal force | B01D
using centrifuges or free-vortex apparatus | B04B, B04C
using magnetic or electrostatic effect | B03C
SOLID/SOLID SEPARATION |
Method |
Dry methods |
material in bulk | B07B
Individual sorting | B07C
Screening, sifting, pneumatic sorting | B07B
using pneumatic tables or jigs | B03B
by magnetic or electrostatic effect | B03C
by centrifugal force | B07B
using centrifuges or free-vortex apparatus | B07B
Wet methods |
General operations | B03B
flotation, differential sedimentation | B03D
screening | B07B
Combinations Dry methods - wet methods | B03B
Apparatus |
Dry methods |
material in bulk | B07B
Individual sorting | B07C
Screening, sifting, pneumatic sorting | B07B
using pneumatic tables or jigs | B03B
by magnetic or electrostatic effect | B03C
by centrifugal force | B07B
using centrifuges or free-vortex apparatus | B04B, B04C
Wet methods |
General operations | B03B
flotation, differential sedimentation | B03D
screening | B07B
Combinations Dry methods - wet methods | B03B

PRINTING

|  | B43 |
WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES

|  | B43K |
IMPLEMENTS FOR WRITING OR DRAWING (containers, casings or accessories for cosmetic substances, e.g. shaving soap, lipstick, make-up, Fulltext... Hierarchy... Expanded...A45D 34/00, Fulltext... Hierarchy... Expanded...A45D 40/00)

|  | B43K |
Note(s) In this subclass, the following expression is used with the meaning indicated: [6] "writing implements" covers pens, pencils, crayons, chalks or like markers for writing or drawing. [6]

|  | B43K |
Subclass index
IMPLEMENTS WITH CORES |
Without mechanisms | 19/00
With mechanisms | 21/00
Accessories | 23/00, 25/00
IMPLEMENTS USING INK |
Without reservoir | 3/00
With reservoir | 5/00, 7/00, 8/00
Nibs; filling devices; caps | 1/00, 17/00; 11/00; 23/00
Manufacture, maintenance | 13/00, 15/00
SELECTING, PROJECTING, RETRACTING OR LOCKING WRITING UNITS | 24/00
MULTIPLE-POINT WRITING IMPLEMENTS | 27/00
COMBINATIONS |
Of writing implements with other articles | 29/00, 31/00

|  | B43L |
ARTICLES FOR WRITING OR DRAWING UPON; ACCESSORIES FOR WRITING OR DRAWING (workshop equipment for marking-out work Fulltext... Hierarchy... Expanded...B25H 7/00; teaching hand-writing or drawing Fulltext... Hierarchy... Expanded...G09B 11/00)

|  | B43L |
Note(s) This subclass does not cover devices used for both teaching and facilitating writing or drawing, which are covered by group Fulltext... Hierarchy... Expanded...G09B 11/00. [3]

|  | B43L |
Subclass index
ARTICLES FOR WRITING OR DRAWING UPON |
Boards or tablets | 1/00
Underlays | 3/00
Drawing-boards | 5/00
AIDS FOR DRAWING |
Straight lines | 7/00
Circles | 9/00
Other curves | 11/00
Means to prevent slippage | 12/00
Other figures | 13/00
ATTACHMENT TO HANDS OR ARMS | 15/00
BLOTTERS | 17/00
ACCESSORIES FOR |
Rubbing or erasing | 19/00
Cleaning blackboards or slates | 21/00
Sharpening pencils or leads | 23/00
INK RECEPTACLES; INK STANDS | 25/00; 27/00

|  | B43M |
BUREAU ACCESSORIES NOT OTHERWISE PROVIDED FOR (stapling devices Fulltext... Hierarchy... Expanded...B25C, Fulltext... Hierarchy... Expanded...B27F; devices for temporarily attaching sheets together Fulltext... Hierarchy... Expanded...B42F; adhesive tape dispensers Fulltext... Hierarchy... Expanded...B65H 35/07)

|  | B43M |
Subclass index
FIXING SEALS; INSERTING DOCUMENTS INTO, CLOSING, OR OPENING, ENVELOPES | 1/00; 3/00, 5/00, 7/00
PAPER-WEIGHTS; DEVICES FOR APPLYING LIQUIDS; STAMP DISPENSERS; DRAWING-PINS OR THUMB-TACKS; OTHER ACCESSORIES | 9/00; 11/00; 13/00; 15/00; 17/00