4. Plastic and nonmetallic article shaping or treating: processes
  5. Direct application of fluid pressure differential to...
  6. With internal application of fluid pressure

Barbara Carstensen

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Compressible objects combined with a drilling fluid to form...

Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate

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Method for fabricating compressible objects for a variable...

Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – With internal application of fluid pressure
Reexamination Certificate

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System for managing variable density drilling mud

Boring or penetrating the earth – With above-ground means for preparing or separating drilling...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2319144

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