The Patent Finder

Polytronics, Ltd.

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

Showing 1 to 10 of 10 · Back to Polytronics, Ltd.

PatentTitleStatus Expires Confidence
US 6,622,037Transdermal administrating device
Lapsed on the fee record
Ended Sep 16, 2015 · From the USPTO record
Lapsed on the fee recordEnded Sep 16, 2015From the USPTO record
US 6,565,890Antiviral drugs containing heteropolyanions
Lapsed on the fee record
Ended May 20, 2007 · From the USPTO record
Lapsed on the fee recordEnded May 20, 2007From the USPTO record
US 4,500,160Electrical connector device
Term ended
Term ended no later than Feb 19, 2005 · Low confidence
Term endedTerm ended no later than Feb 19, 2005Low confidence
US 4,857,826Tester system for electrical power circuits terminated at an outlet plug receptacle
Formerly held
Term ended
Term ended no later than Aug 15, 2009 · Low confidence
Term endedTerm ended no later than Aug 15, 2009Low confidence
US 4,878,852Circuit tester construction
Formerly held
Term ended
Term ended no later than Nov 7, 2009 · Low confidence
Term endedTerm ended no later than Nov 7, 2009Low confidence
US 5,772,688Skin-contact type medical treatment apparatus
Term ended
Term ended no later than Jun 30, 2018 · Low confidence
Term endedTerm ended no later than Jun 30, 2018Low confidence
US 5,817,139Skin-contact type antiallergic skin-therapeutic apparatus using voltage pulse train
Term ended
Term ended no later than Oct 6, 2018 · Low confidence
Term endedTerm ended no later than Oct 6, 2018Low confidence
US 5,848,985Skin-contact type medical treatment apparatus
Term ended
Term ended no later than Dec 15, 2018 · Low confidence
Term endedTerm ended no later than Dec 15, 2018Low confidence
US 5,944,685Skin-contact type medical treatment apparatus
Term ended
Term ended no later than Aug 31, 2019 · Low confidence
Term endedTerm ended no later than Aug 31, 2019Low confidence
US D312,583Circuit tester
Formerly held
Term ended
Term ended
The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited