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Nope - no transit visa required for a 1h40 transit in Kuwait en route to the USA as an Indian citizen.
/ 07APR16 / 1828 UTC
National India (IN) Transit Kuwait (KW) Destination USA (US)
TWOV (Transit Without Visa): Visa required, except for Holders of onward tickets for a max. transit time of 24 hours.
- In case of transit connections beyond 8 hours, passengers must remain airside and be accommodated in the airport transit hotel.
Source: Timaticweb