For same Invention the IPC class of patent family member are varied

[Amitpatel.in]

Dear Sir/Madam,

I had observed a case where in the assigned IPC class of the patents of same family member are varied, no similar codes were found in between to them. WHY SUCH THING HAS HAPPENED....:?

Details are as below:

1. 2123603 DIAMOND MICROPOWDER, METHOD OF TRAPPING THE SAME, AND DIAMOND SLURRY HAVING DIAMOND MICROPOWDER DISPERSED THEREIN

Assigned IPC class for this patent are as : C01B 31/06  ,  C09K 3/14  &  B03B 5/28

2.  20110052915 MINUTE DIAMOND POWDER, METHOD FOR COLLECTING THE SAME AND SLURRY COMPRISNG THE SAME IN SUSPENSION

Assigned IPC class for this patent are as : 

C07C 45/00  ,  B82Y 40/00  ,  B82Y 30/00  ,  B32B 5/16  &  C07C 29/00

Regards

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