formula that calc the diff in time, with a less than function?

[Debbs]

I need a formula that calculates the difference in 2 times but if the
difference is less than a certian amount of minutes i want the cell to show
pattern or something dis-allowing cell entry example: 1:00 + 2h:15m= 3:15
(the 2hr 15 comes from another cell) in the cell next to 3:15 is where I need
the formula to calculate the same as the other but if the difference between
the 2 cells is less than a specific amount of minutes i want the cell to show
a pattern or text or some indicator that to little time is in between what is
allowed. Any help?????

 

[Gary L Brown]

Subtract one time from the other and use conditional formatting to highlight
undesirable times.
HTH,