| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b27deaf45890893586c2ed77ac13dc32 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C22-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C22-18 |
| filingDate |
2002-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_560a7ab60848c00ba650869d985d64dc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0aeecafb86f0b6af6b10cd4447459642 |
| publicationDate |
2003-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-2003231974-A |
| titleOfInvention |
Surface-treated steel, its production method and chemical conversion liquid |
| abstract |
(57) [Problem] To develop a chemical conversion treatment solution capable of stably forming a phosphate conversion coating on joints of oil country tubular goods containing 0.5 to 13% Cr. A chemical conversion coating containing a predetermined thickness and a predetermined amount of a potassium compound is formed on a screw surface of an oil well steel pipe joint using a chemical conversion treatment solution to which a predetermined amount of potassium ions is added. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/NO-341188-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111108376-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-7172453-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2009280845-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2005054541-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2020070479-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7666266-B2 |
| priorityDate |
2001-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |