IPC国际专利分类C22B类-金属的生产或精炼（金属粉末或其悬浮物的制取入B22F 9/00；电解法或电泳法生产金属入C25）；原材料的预处理:包含不包含在本小类其他类目中的金属的提取（铁入C21）〔2〕镉的提炼汞的提取贵金属的提炼镓或铟的提取〔2〕碱金属、碱土金属或镁的提取〔2〕铝的提炼锰的提取难熔金属的提取〔2〕镍或钴的提炼铍的提取铅的提炼锑、砷或铋的提取等;专利分类查询上八戒知识产权!

2017年1月1日 · In this subclass, groups for obtaining metals include obtaining the metals by non-metallurgical processes, and obtaining metal compounds by metallurgical processes.

申请专利要符合哪些要求？ 国内专利可以分为几类？ IPC国际专利分类C22类-冶金；黑色或有色金属合金；合金或有色金属的处理:包含金属的生产或精炼（金属粉末或其悬浮物的制取入B22F 9/00合金（合金的处理入C21D、C22F）改变有色金属或有色合金的物理结构（专用于黑色合金或钢热处理的工艺和用于金属或合金热处理的设备入C21D）等;专利分类查询上八戒知识产权!

Thus, for example, group C22B 11/00 covers the production of silver by reduction of ammoniacal silver oxide in solution, and group C22B 17/00 includes the production of cadmium oxide by a metallurgical process.

Metallurgical or chemical processes for producing or recovering metals from metal compounds, ores, waste or scrap metal and for refining metal. Included in this subclass are processes drawn to: the production of metal by smelting, roasting or furnace method; the extraction of metal compounds from ore and concentrates by wet processes;

arsenic and antimony are classified in C01G, production of the elements themselves is covered by C22B, as well as the production of their compounds by metallurgical processes. Subclass index

c22b是指金属的生产或精炼（金属粉末或其悬浮物的制取入b22f9/00；电解法或电泳法生产金属入c25）；原材料的预处理。c22b相关专利至今一共有255905个申请，其中，发明专利申请203637个，实用新型申请23413个。85871...

IPC国际专利分类C22B1/02组-焙烧工艺过程（C22B 1/16优先）:包含鼓风焙烧硫酸化焙烧氯化焙烧流态化焙烧等;专利分类查询上八戒知识产权!

The C-22B, a Boeing 727-100, is the primary medium-range aircraft used by the Air National Guard and National Guard Bureau to airlift personnel. The C-22B's unique arrangement of leading-edge devices and trailing-edge flaps permit lower approach speeds, thus allowing operation from runways never intended for a 600-mph (Mach 0.82) aircraft.

Notes: Boeing 727-100 modified for air national guard support missions.