Assertion: lactic acid | /r/CapableOf | see o. 4,813,997
Facets:
value: to kinnersley et al.
type: TRANSITIVE-OBJECT
Source sentences:
text: In addition, it has been discovered that oligomers of polylactic acid are useful as plant growth promoters, see U.S. patent o. 4,813,997 to Kinnersley et al., issued March 21, 1989.