blank Quick help
blank Maintenance news

Scheduled maintenance

Regular maintenance outages:
between 05.00 and 05.15 hrs CET (Monday to Sunday).

Other outages
Availability

2022.02.11

More...
blank News flashes

News Flashes

New version of the European Patent Register – SPC proceedings information in the Unitary Patent Register.

2024-07-24

More...
blank Related links

Release notes
European Patent Register Assistant
European Patent Register Resource Book
European Patent Register – pocket guide
FAQ - European Patent Register
Federated Register (Flyer)
Global Dossier (Flyer)
Register events
Deep link coverage
Federated Register content
The Patent Information Tour
Fair use charter

Extract from the Register of European Patents

EP Citations: EP0121381

Cited inSearch
Type:Patent literature
Publication No.:US3813652  [A]
 (ELMER B, et al);
Type:Patent literature
Publication No.:US4281392  [X]
 (GRANTS VALDIS, et al);
Type:Patent literature
Publication No.:US4296467  [AD]
 (NIBBY JR CHESTER M, et al);
Type:Patent literature
Publication No.:US4303993  [AD]
 (PANEPINTO JR WILLIAM, et al)