Policy Rationales
a.    Pressures you to file quickly
b.    Ensures patent term is meaningful—you don’t get rights from years before patenting.
c.    Reluctant to remove ideas from public domain. Don’t want to large a period to pass as people will come to depend on ideas. Don’t like idea of getting people dependent on new technology then charging them for it.
d.    Give inventors a year to think about whether invention is worth patenting.
(A)    Conforms to our view of science—peer review window.
(B)    Gives inventor breathing room.
(C)    Inventor’s legitimate interest in testing market’s reaction to the invention to see if its chances of commercial success justify cost of patenting