Preparation of sulfur; Purification

Introduced: September 1968

Full Title

Sulfur; Compounds thereof > Preparation of sulfur; Purification

CPC subdivides this area 3x more granularly than IPC with 9 additional codes.

9 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

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C01B 17/0205 CPC only CPC only
C01B 17/021 CPC only CPC only
C01B 17/0216 CPC only CPC only
C01B 17/0221 CPC only CPC only
C01B 17/0226 CPC only CPC only
C01B 17/0232 CPC only CPC only
C01B 17/0237 CPC only CPC only
C01B 17/0243 +1 CPC CPC only CPC only
C01B 17/0253 +1 CPC CPC only CPC only
C01B 17/027 Recovery of sulfur from material containing elemental sulfur, e.g. luxmasses ; Purification since 1980 IPC+CPC Available in IPC and CPC
C01B 17/04 from gaseous sulfur compounds including gaseous sulfides +3 CPC IPC+CPC Available in IPC and CPC
C01B 17/06 from non-gaseous sulfides or materials containing such sulfides, e.g. ores IPC+CPC Available in IPC and CPC
C01B 17/10 Finely divided sulfur, e.g. sublimed sulfur, flowers of sulfur IPC+CPC Available in IPC and CPC
C01B 17/12 Insoluble sulfur (mu-sulfur) +1 CPC IPC+CPC Available in IPC and CPC

Class C01,2013–2023, worldwide · Source: EPO PATSTAT

Class C01,2013–2023, worldwide · Source: EPO PATSTAT

CHINESE ACADEMY OF SCIENCES 4,293
LG CHEM KR 3,317
BASF (BADISCHE ANILIN & SODA FABRIK) DE 2,219
SINOPEC (CHINA PETROCHEMICAL CORPORATION) 2,154
OMYA INTERNATIONAL CH 1,524
PANASONIC INTELLECTUAL PROPERTY JP 1,362
SAUDI ARABIAN OIL COMPANY SA 1,298
SUMITOMO METAL MINING COMPANY JP 1,286
CENTRAL SOUTH UNIVERSITY 1,243
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,238