Patent Lens, a public patent database containing more than 6 million US, EP and WO patent documents, now allows searchers to limit searches by the predicted expiry date for granted US patents. The date is displayed in the body of the record.
Searchers should note that the predicted expiry date is calculated and does not take into account terminal disclaimers, term extensions or adjustments.
Patent Lens is operated as a “public good global resource for increasing patent transparency” by Cambia, an independent, non-profit scientific research institute located in Canberra Australia.
Patent Librarian's Notebook 
Hi Mike,CAMBIA Patent Lens just posted a press release that we’ve now added full text of the Australia patent and application collection. A new interface too. The Lens is growing rapidly now with over 7,200,000 patent documents, plus embedded status and family information from nearly 60 countries. Please let your readers know, and we’d be grateful for feedback and suggestions.Best wishes