Long Enterprises

Also on record

Records under this name other than patents Long Enterprises holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

Showing 1 to 8 of 8 · Back to Long Enterprises

Patent	Title	Status	Expires	Confidence
US 3,965,298	Deep sea diving speech converter Term ended Term ended no later than Jun 22, 1996 · Low confidence	Term ended	Term ended no later than Jun 22, 1996	Low confidence
US 4,487,699	Sewage sludge treatment apparatus and process Term ended Term ended no later than Dec 11, 2004 · Low confidence	Term ended	Term ended no later than Dec 11, 2004	Low confidence
US 4,582,612	Sewage sludge treatment apparatus Term ended Term ended no later than Apr 15, 2006 · Low confidence	Term ended	Term ended no later than Apr 15, 2006	Low confidence
US 4,659,464	Apparatus for dispersing sludge with gas impingement Term ended Term ended no later than Apr 21, 2007 · Low confidence	Term ended	Term ended no later than Apr 21, 2007	Low confidence
US 4,695,388	Apparatus and process for rapid sewage sludge separation Term ended Term ended no later than Sep 22, 2007 · Low confidence	Term ended	Term ended no later than Sep 22, 2007	Low confidence
US 4,936,983	Sewage sludge treatment with gas injection Term ended Term ended no later than Jun 26, 2010 · Low confidence	Term ended	Term ended no later than Jun 26, 2010	Low confidence
US 5,147,563	Sewage sludge treatment with gas injection Term ended Term ended no later than Sep 15, 2012 · Low confidence	Term ended	Term ended no later than Sep 15, 2012	Low confidence
US 5,248,419	Sewage sludge treatment with gas injection Term ended Term ended no later than Sep 28, 2013 · Low confidence	Term ended	Term ended no later than Sep 28, 2013	Low confidence