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Are the following sentences (the "upon" clause, in particular) are gramatically acceptable?

These examples are from the US patents.

(1) Upon the user selecting the snooze software button, the alarm window is closed.

(2) Upon the next event being detected, the upper order bits at 36 are decremented in accordance
with base-2 counting to 101 and the lower order bits are reset to all 1's.

(3) Upon the input voltage being equal to the fourth voltage reference, the latching comparator 208
can output the enable signal to activate the driving circuit 216.

I am wondering if the term "upon" can be directly followed by a subject of "--ing."

Any comments will be appreciated!!

Mimi
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The structure is grammatically correct, but stilted and rather awkward. Patents tend to be framed in legalistic language...which is often stilted and awkward.

A more felicitous rendering would be 'when' or 'after': After the user selects the snooze software button, the alarm window is closed.
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Dear Mister Micawber,

Thank you very much for your helpful comments!!

If you would use 'when' instead of 'after,' would you say that ' When the user has selected the snooze software button, the alarm window is closed."?

Or, ' When the user selects the snooze software button, the alarm window is closed." would be enough?

I would be happy if you could give me some advice again.

With regards,

Mimi
Both of those sentences are fine, and you could use either. I would choose the 2nd one.
Dear Mister Micawber,

I understood well. Thank you for your clear comments!!!

Mimi
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