Inventor

BUTUC STEFAN

US4 patents

⚠️ This page may combine multiple inventors who share the name “BUTUC STEFAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BUTUC STEFAN

1 patent

US8944789B2Feb 3, 2015

Enhanced elastomeric stator insert via reinforcing agent distribution and orientation

BUTUC STEFAN20 citations84

HUFF PHILIP A

1 patent

US8176933B2May 15, 2012

Annular BOP packing unit

HUFF PHILIP A18 citations84

HYDRIL USA MFG LLC

1 patent

US7736556B2Jun 15, 2010

Revised cure cycle for annular packing units

HYDRIL USA MFG LLC3 citations57

PV FLUID PRODUCTS INC

1 patent

US12378371B2Aug 5, 2025

Stator compound having an azide cured elastomeric base and stators and downhole motors using the same

PV FLUID PRODUCTS INC0 citations48