Was the M48 Patton tank the last Patton tank?

Correct. Even though you will see plastic model kits, sometimes books, and advertisements calling the M60 that name, they will be incorrect; normally those companies took a short cut in researching their titles and, often choose the first name they saw.

The M60 was called the M60 Combat Tank, Full Tracked, and was fielded in 1960. The US Army wanted to officially name the M60, the M60 MBT (Main Battle Tank) but the paperwork had already been processed for "Combat Tank", so they let it stand. However, the M60 did in fact become the US Army's first MBT, and was referred to that name during the 1960's and 1970's. The M60 MBT looks almost exactly like the M48 Patton, which was officially called the "M48 90mm Gun Tank Patton." The only external differences are:

1. M60 MBT has a straight edged front slope; M48's is rounded.
2. M60 MBT has a flat slabbed sided turret on each side; M48's is rounded.
3. M60 MBT has 3 support rollers per side; M48's have 5 per side.
4. M60 MBT has aluminum road wheels; M48's are steel.
5. M60 MBT has a 105mm gun with bore evacuator in the middle and no flash suppresser. M48 has a 90mm gun with the bore evacuator near the muzzle and touching the flash suppressor.

There were only 3 Pattons: M46 (a modified M26 Pershing); M47; M48. The M46 Patton saw action in Korea, the M48 Patton saw combat in Vietnam. The M47 Patton was used in films: Battle of the Bulge as a German Tiger tank, and also for target practice for tank gunnery at various US Army tank ranges. The M47 Patton was never used by US forces in combat.