Assignee
GRUPPING ARNOLD
NL·4 granted patents·443 citations·filing 1978–1991
Top patents by PatentIndex Score
4 records- 0196US4243101ACoal gasification methodGRUPPING ARNOLD·Filed 1978·Granted Jan 6, 1981·340 cites·1 claims
- 0280US5287926AMethod and system for underground gasification of coal or browncoalGRUPPING ARNOLD·Filed 1991·Granted Feb 22, 1994·85 cites·16 claims
- 0343US4808029ASystem for subterranean storage of energyGRUPPING ARNOLD·Filed 1987·Granted Feb 28, 1989·10 cites·7 claims
- 0438US4441554AMethod for the underground gasification of coal or browncoalGRUPPING ARNOLD·Filed 1981·Granted Apr 10, 1984·8 cites·11 claims
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