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IPC Subgroup
E04F 15/18

Separately-laid insulating layers; Other additional insulating measures; Floating floors

Introduced: September 1968

Last revised: January 2006

Full Title

Flooring > Separately-laid insulating layers; Other additional insulating measures; Floating floors

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
BUILDING
Subclass:
FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS

Filing statistics

IPC E04F 15/18 belongs to the parent subclass E04F, which recorded 223,123 patent applications worldwide between 2013 and 2023. Annual filings grew from 10,758 in 2013 to 24,103 in 2023 (+124%), peaking at 30,165 applications in 2020. The most active applicants in class E04 are CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION (6,575 applications), ZHEJIANG YASHA DECORATION COMPANY (4,488 applications) and SGCC(STATE GRID CORPORATION OF CHINA) (4,427 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

INSULATION measures in the flooring of buildings

1 direct subcode

Child Classifications

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Top Applicants

Top 10 applicants by patent filingsfor class E04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 6,575
  2. ZHEJIANG YASHA DECORATION COMPANY 4,488
  3. SGCC(STATE GRID CORPORATION OF CHINA) 4,427
  4. CHINA CONSTRUCTION SECOND ENGINEERING BUREAU 4,352
  5. CHINA MCC17 GROUP COMPANY 3,122
  6. GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 2,605
  7. SHENYANG JIANZHU UNIVERSITY 2,420
  8. CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION COMPANY 2,284
  9. CHINA CONSTRUCTION FIFTH ENGINEERING DIVISION CORPORATION 2,008
  10. CHINA CONSTRUCTION FIRST BUILDING (GROUP) CORPORATION 1,967