| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_91d75e531cbfe10da9c230b92f206709
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_51b30417fd5eeda68fbde3ce14afdeb3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_04ddad32093bb39938c9a4a6a7431bc0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_30a41ceef954023ec1b5f7dbbf9297d1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_48f9c3917ad54e5f8e5880638e853404 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L58-182
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C22-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F16L15-001
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C23C22-18 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C22-78 |
| filingDate |
2006-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b44d4823a4b86a72d7fc24a48b79ddfa
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_241a96a7fcd2a300a4a66e88b8a4feb3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_826da0b78087e3d107e39634c0624b33
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e78b3a6a93ad255d1fb0cbae627d6aa4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a76da5bb9bd5bf87677d41f5e057fe8c |
| publicationDate |
2007-03-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2007056656-A1 |
| titleOfInvention |
Surface conditioning prior to chemical conversion treatment of a steel member |
| abstract |
By subjecting a threaded joint for OCTG (oil country tubular goods) to surface conditioning with an aqueous solution of potassium tetraborate or sodium tetraborate prior to manganese phosphate chemical conversion treatment, a manganese phosphate chemical conversion coating having coarse crystal grains with an average crystal grain diameter of 10-110 micrometers is formed on the surface of the steel member which may be any steel including a high Cr steel. This manganese phosphate chemical conversion coating can hold a large amount of a liquid lubricant, and it is effective at preventing the occurrence of galling at the time of makeup of a threaded joint for OCTG. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113776798-A |
| priorityDate |
2003-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |