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DIFF Subgroup
B28C 1/08

Separating suspensions, e.g. for obtaining clay, for removing stones;

Introduced: September 1968

Title

Titles differ between systems:

IPC: Separating suspensions, e.g. for obtaining clay, for removing stones

CPC: Separating suspensions, e.g. for obtaining clay, for removing stones;

Full Title

Full titles differ between systems:

IPC:

Apparatus or methods for obtaining or processing clay > for producing or processing clay suspensions > Processing suspensions > Separating suspensions, e.g. for obtaining clay, for removing stones

CPC:

Apparatus or methods for obtaining or processing clay (filtration in general B01D; separation of solids from solids B03, B07; chemical part C04B; by mining or quarrying E21C41/16, E21C41/26, E21C47/10) > for producing or processing clay suspensions (producing or processing suspensions in general B01) > Processing suspensions > Separating suspensions, e.g. for obtaining clay, for removing stones;

Of 4 combined children, 0 exist in both systems.

4 codes are CPC-only extensions.

Child Classifications

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Top Applicants

Top Applicants (IPC)

Class B28,2013–2023, worldwide · Source: EPO PATSTAT

  1. MITSUBOSHI DIAMOND INDUSTRIAL COMPANY 868
  2. QINGDAO GAOCE TECHNOLOGY COMPANY 678
  3. DISCO CORPORATION JP 500
  4. ZHOU ZHAODI 500
  5. MITSUBOSHI DIAMOND INDUSTRIAL COMPANY JP 456
  6. HILTI LI 455
  7. CORNING US 407
  8. UNITED STATES GYPSUM COMPANY US 375
  9. ZHENGZHOU YUAN DONG REFRACTORIES COMPANY 370
  10. HUNAN SANY KUAIERJU RESIDENTIAL INDUSTRY COMPANY 351

Top Applicants (CPC)

Class B28,2013–2023, worldwide · Source: EPO PATSTAT

  1. DISCO CORPORATION JP 1,471
  2. HILTI LI 575
  3. CORNING US 544
  4. MITSUBOSHI DIAMOND INDUSTRIAL COMPANY JP 518
  5. UNITED STATES GYPSUM COMPANY US 485
  6. DISCO ABRASIVE SYSTEM 459
  7. GE (GENERAL ELECTRIC COMPANY) US 454
  8. MITSUBOSHI DIAMOND INDUSTRIAL COMPANY 439
  9. DISCO CORPORATION 403
  10. NGK INSULATORS JP 308