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CPC Subgroup
F02K 9/10

Shape or structure of solid propellant charges

Full Title

Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof > using solid propellants (F02K9/72 takes precedence; using semi-solid or pulverulent propellants F02K9/70) > Shape or structure of solid propellant charges

Filing statistics

CPC F02K 9/10 belongs to the parent subclass F02K, which recorded 24,838 patent applications worldwide between 2013 and 2023. Annual filings grew from 1,984 in 2013 to 2,058 in 2023 (+4%), peaking at 2,809 applications in 2019. The most active applicants in class F02 are ROBERT BOSCH (8,801 applications), FORD GLOBAL TECHNOLOGIES (8,171 applications) and GE (GENERAL ELECTRIC COMPANY) (6,957 applications).

Source: EPO PATSTAT, worldwide filings

6 direct subcodes

Child Classifications

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  • F02K 9/12 made of two or more portions burning at different rates
  • F02K 9/14 made from sheet-like materials, e.g. of carpet-roll type, of layered structure
  • F02K 9/16 of honeycomb structure
  • F02K 9/18 of the internal-burning type having a star or like shaped internal cavity
  • F02K 9/20 of the external-burning type
  • F02K 9/22 of the front-burning type

Top Applicants

Top 10 applicants by patent filingsfor class F02, 2013–2023, worldwide · Source: EPO PATSTAT

  1. ROBERT BOSCH DE 8,801
  2. FORD GLOBAL TECHNOLOGIES US 8,171
  3. GE (GENERAL ELECTRIC COMPANY) US 6,957
  4. HYUNDAI MOTOR COMPANY KR 5,390
  5. UNITED TECHNOLOGIES CORPORATION (UTC) US 5,250
  6. TOYOTA MOTOR CORPORATION JP 5,214
  7. TOYOTA MOTOR CORPORATION 4,149
  8. DENSO CORPORATION JP 3,400
  9. KIA MOTORS CORPORATION KR 3,388
  10. SAFRAN AIRCRAFT ENGINES FR 3,332