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Patent applications and USPTO patent grants for Ortloff; Donald J..The latest application filed is for "tubular coupling with metal to metal seal".
Patent | Date |
---|---|
Tubular coupling with metal to metal seal Grant 5,423,579 - Blose , et al. June 13, 1 | 1995-06-13 |
Elastomeric guard seal for tubular connections Grant 4,928,999 - Landriault , et al. May 29, 1 | 1990-05-29 |
Threaded pipe connection having wedge threads Grant 4,703,954 - Ortloff , et al. November 3, 1 | 1987-11-03 |
Well pipe joint Grant 4,688,832 - Ortloff , et al. August 25, 1 | 1987-08-25 |
Seal for threaded pipe connection Grant 4,671,544 - Ortloff June 9, 1 | 1987-06-09 |
Tubular joint with trapped mid-joint metal-to-metal seal having unequal tapers Grant 4,662,659 - Blose , et al. May 5, 1 | 1987-05-05 |
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