The Patent Finder

Willow Technology, Inc.

Also on record
Records under this name other than patents Willow Technology, Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.

Showing 1 to 7 of 7 · Back to Willow Technology, Inc.

PatentTitleStatus Expires Confidence
US 3,941,357Method and apparatus for mixing viscous materials
Term ended
Term ended no later than Mar 2, 1996 · Low confidence
Term endedTerm ended no later than Mar 2, 1996Low confidence
US 4,306,978Method for lime stabilization of wastewater treatment plant sludges
Term ended
Term ended no later than Dec 22, 2001 · Low confidence
Term endedTerm ended no later than Dec 22, 2001Low confidence
US 4,619,381Method and apparatus for discharging materials from a storage bin
Term ended
Term ended no later than Oct 28, 2006 · Low confidence
Term endedTerm ended no later than Oct 28, 2006Low confidence
US 4,658,891Method and apparatus for thermally processing viscous, shear sensitive materials
Term ended
Term ended no later than Apr 21, 2007 · Low confidence
Term endedTerm ended no later than Apr 21, 2007Low confidence
US 4,708,268Method and apparatus for the accurate volumetric feeding of materials
Term ended
Term ended no later than Nov 24, 2007 · Low confidence
Term endedTerm ended no later than Nov 24, 2007Low confidence
US 4,997,572High rate method for alkaline stabilization, beneficiating and pelletizing of wastewater treatment plant sludges
Term ended
Term ended no later than Mar 5, 2011 · Low confidence
Term endedTerm ended no later than Mar 5, 2011Low confidence
US 5,196,043Delayed, exothermic, alkaline sterilization method for treating wastewater sludges
Term ended
Term ended no later than Mar 23, 2013 · Low confidence
Term endedTerm ended no later than Mar 23, 2013Low confidence
The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited