4. Synthetic resins or natural rubbers -- part of the class 520 ser
  5. Synthetic resins
  6. Polymers from only ethylenic monomers or processes of...

Michael Lefenfeld

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Silica gel compositions containing alkali metals and alkali...

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Silicon containing or process of making
Reexamination Certificate

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Silica gel compositions containing alkali metals and alkali...

Chemistry of inorganic compounds – Hydrogen or compound thereof – Elemental hydrogen
Reexamination Certificate

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Silica gel compositions containing alkali metals and alkali...

Mineral oils: processes and products – Refining – Metal contaminant removal
Reexamination Certificate

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Silicide compositions containing alkali metals and methods...

Chemistry of inorganic compounds – Silicon or compound thereof – Binary compound
Reexamination Certificate

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System for delivery of active substances

Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
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Profile ID: LFUS-PAI-P-2344579

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