Lenovo introduced the ThinkPad X1 Carbon back in May, and the device will reportedly ship by the end of the month. No concrete release date has been announced, but it should be available soon enough, through Lenovo’s partners and Lenovo.com. On the product page, it still just says “available summer 2012”.

A commenter at SlashGear indicates that a Lenovo sales rep told him the date would be August 21st.

The ThinkPad X1 Carbon is the lightest 14″ Ultrabook in the world, according to Lenovo.

“Created for those who demand the highest levels of performance, mobility, entertainment and design, the ThinkPad X1 Carbon exceeds Ultrabook specifications by using a premium carbon fiber rollcage to create a durable Ultrabook weighing less than three pounds,” the company says.

“Just like in the automotive industry, carbon fiber materials add structural strength and durability while minimizing weight,” the company adds on the product page.

It comes with embedded 3G connectivity and a mobile pay-as-you go option, and contains Intel vPro technology.

Lenovo also touts the fact that you can bring up the battery life of the device to 80% strength in as little as 35 minutes with its RapidCharge feature.

When the company introduced the X1 Carbon, it also revealed a new portfolio of ThinkPad laptops, the new ThinkPad X, T, W, and L Series models, which come with 3rd generation Intel Core processors and Lenovo Enhanced Experience 3.0. The laptops are 40% faster than typical Windows 7 computers, according to the company. These came out in June.