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Extract from the Register of European Patents

EP Citations: EP0489438

Cited inSearch
Type:Patent literature
Publication No.:EP0207378  [A]
 (PHILLIPS PETROLEUM CO [US]);
Type:Patent literature
Publication No.:US4774215  [A]
 (DRAKE CHARLES A [US], et al);
Type:Patent literature
Publication No.:EP0313050  [A]
 (PHILLIPS PETROLEUM CO [US]);
Type:Patent literature
Publication No.:EP0351748  [X]
 (PHILLIPS PETROLEUM CO [US])