DIFF Subgroup
C03B 23/04 Re-forming tubes or rods
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Re-forming shaped glass > Re-forming tubes or rods
CPC:
Re-forming shaped glass (re-forming fibres or filaments C03B37/14) > Re-forming tubes or rods
IPC and CPC are identically structured here. All 14 subcodes exist in both systems.
6 shared codes have differing titles between IPC and CPC.
Child Classifications
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- C03B 23/043 Heating devices specially adapted for re-forming tubes or rods in general, e.g. burners since 1990 IPC+CPC Available in IPC and CPC
- C03B 23/045 Tools or apparatus specially adapted for re-forming tubes or rods in general, e.g. glass lathes, chucks (C03B23/043 takes precedence) since 1990 IPC+CPC Available in IPC and CPC
- C03B 23/047 by drawing ( , C03B37/025 takes precedence) since 1990 +2 CPC IPC+CPC Available in IPC and CPC
- C03B 23/049 by pressing (C03B21/04 , C03B23/26 take precedence) since 1990 +2 CPC IPC+CPC Available in IPC and CPC
- C03B 23/053 by centrifuging ( , C03B37/04 takes precedence) since 1990 IPC+CPC Available in IPC and CPC
- C03B 23/057 by fusing, e.g. for flame sealing (C03B9/42, C03B21/06 , C03B33/08 take precedence) since 1990 IPC+CPC Available in IPC and CPC
- C03B 23/07 by blowing, e.g. for making electric bulbs since 1980 +1 CPC IPC+CPC Available in IPC and CPC
- C03B 23/09 Reshaping the ends, e.g. as grooves, threads or mouths since 1980 +8 CPC IPC+CPC Available in IPC and CPC
- C03B 23/11 Reshaping by drawing without blowing, in combination with separating, e.g. for making ampoules since 1980 +3 CPC IPC+CPC Available in IPC and CPC
- C03B 23/13 Reshaping combined with uniting or heat sealing, e.g. for making vacuum bottles since 1980 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class C03,2013–2023, worldwide · Source: EPO PATSTAT
- CORNING US 8,800
- SAINT-GOBAIN GLASS FR 3,535
- NIPPON ELECTRIC GLASS COMPANY JP 2,675
- NIPPON ELECTRIC GLASS COMPANY 2,616
- AGC JP 1,911
- SCHOTT DE 1,846
- ASAHI GLASS COMPANY JP 1,632
- CORNING 1,556
- A G C 1,250
- SEKISUI CHEMICAL COMPANY JP 1,087
Top Applicants (CPC)
Class C03,2013–2023, worldwide · Source: EPO PATSTAT
- CORNING US 9,559
- SAINT-GOBAIN GLASS FR 3,824
- NIPPON ELECTRIC GLASS COMPANY JP 2,792
- SCHOTT DE 2,029
- AGC JP 1,938
- ASAHI GLASS COMPANY JP 1,679
- CORNING 1,650
- NIPPON ELECTRIC GLASS COMPANY 1,501
- A G C 1,049
- O-I (OWENS-ILLINOIS) US 1,027