ERC Industries, Inc.
Patent Owner
Stats
- 4 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Nov 26, 2002 most recent publication
Details
- 4 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 178 Total Citation Count
- Mar 12, 1997 Earliest Filing
- 5 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
Patent #
Title
Filing Date
Issue Date
Intl Class
6484382 Method of providing an internal circumferential shoulder in a cylindrical passagewayAug 31, 00Nov 26, 02[B23P]
6176310 Assembly for sealing the annulus between concentric cylindrical surfacesFeb 19, 99Jan 23, 01[E21B]
5984008 Installable load shoulder for use in a wellhead to support a tubing hangerOct 16, 97Nov 16, 99[E21B]
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5743288 Valve having provision for replacing stem packing while the valve is under pressureExpiredMar 12, 97Apr 28, 98[F16K]
Top Inventors for This Owner
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