Assignee
ERC IND INC
US·9 granted patents·334 citations·filing 1996–2000
Top patents by PatentIndex Score
9 records- 0178US6158718AGate valveERC IND INC·Filed 1999·Granted Dec 12, 2000·40 cites·13 claims
- 0278US5908046ABack seat rising stem gate valveERC IND INC·Filed 1998·Granted Jun 1, 1999·44 cites·13 claims
- 0377US5951066AConnecting system for wellhead componentsERC IND INC·Filed 1998·Granted Sep 14, 1999·88 cites·10 claims
- 0472US5743288AValve having provision for replacing stem packing while the valve is under pressureERC IND INC·Filed 1997·Granted Apr 28, 1998·36 cites·10 claims
- 0569US6012519AFull bore tubing hanger systemERC IND INC·Filed 1998·Granted Jan 11, 2000·58 cites·5 claims
- 0667US5746453AHigh temperature inline expansion jointERC IND INC·Filed 1996·Granted May 5, 1998·32 cites·22 claims
- 0741US6484382B1Method of providing an internal circumferential shoulder in a cylindrical passagewayERC IND INC·Filed 2000·Granted Nov 26, 2002·5 cites·13 claims
- 0840US5984008AInstallable load shoulder for use in a wellhead to support a tubing hangerERC IND INC·Filed 1997·Granted Nov 16, 1999·23 cites·3 claims
- 0930US6176310B1Assembly for sealing the annulus between concentric cylindrical surfacesERC IND INC·Filed 1999·Granted Jan 23, 2001·8 cites·6 claims
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