美国有没有抵触申请？

102(a)(2)类似抵触申请，既可以评价新颖性，也可以评价创造性

A可以用来评价新影响和创造性
但是有三种例外
(A) the subject matter disclosed was obtained directly or indirectly from the inventor or a joint inventor;
(B) the subject matter disclosed had, before such subject matter was effectively filed under subsection (a)(2), been publicly disclosed by the inventor or a joint inventor or another who obtained the subject matter disclosed directly or indirectly from the inventor or a joint inventor; or
(C) the subject matter disclosed and the claimed invention, not later than the effective filing date of the claimed invention, were owned by the same person or subject to an obligation of assignment to the same person.

不是太了解国内抵触申请的情况，但是你说的例子，如果A是美国申请的公开或美国专利，且A有至少一个与B不同的发明人，则根据35 usc 102(a)(2)可以引入A判断新颖性和创造性。