Assignee
DEEP SHAFT TECH INC
CA·5 granted patents·166 citations·filing 1994–1996
Top patents by PatentIndex Score
5 records- 0179US5651892ABiodegradeable effluent nutrient removalDEEP SHAFT TECH INC·Filed 1996·Granted Jul 29, 1997·49 cites·5 claims
- 0276US5650070AAerobic long vertical shaft bioreactorsDEEP SHAFT TECH INC·Filed 1996·Granted Jul 22, 1997·42 cites·11 claims
- 0373US5645726ATreatment of waste liquor in a vertical shaft bioreactorDEEP SHAFT TECH INC·Filed 1996·Granted Jul 8, 1997·40 cites·17 claims
- 0455US5513903AMethod and apparatus for developing shafts using small diameter shaftsDEEP SHAFT TECH INC·Filed 1994·Granted May 7, 1996·20 cites·22 claims
- 0549US5660724AMulti-pressure head tank for use with vertical shaft bioreactorsDEEP SHAFT TECH INC·Filed 1996·Granted Aug 26, 1997·15 cites·11 claims
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