Preservation Technologies LP

Also on record

Records under this name other than patents Preservation Technologies LP 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 Preservation Technologies LP

Patent	Title	Status	Expires	Confidence
US 6,325,982	Method and apparatus for the deacidification of library materials Term ended Term ended Aug 11, 2019 · From the USPTO record	Term ended	Term ended Aug 11, 2019	From the USPTO record
US 6,060,108	Method for revealing hidden watermarks Term ended Term ended Aug 28, 2018 · From the USPTO record	Term ended	Term ended Aug 28, 2018	From the USPTO record
US 6,080,448	Deacidification of cellulose based materials using hydrofluoroether carriers Term ended Term ended Apr 3, 2018 · From the USPTO record	Term ended	Term ended Apr 3, 2018	From the USPTO record
US 6,342,098	Deacidification of cellulose based materials using hydrofluoroether carriers Term ended Term ended Apr 3, 2018 · From the USPTO record	Term ended	Term ended Apr 3, 2018	From the USPTO record
US 5,409,736	Deacidification of cellulose based materials using perfluorinated carriers Term ended Term ended no later than Apr 25, 2015 · Low confidence	Term ended	Term ended no later than Apr 25, 2015	Low confidence
US 5,422,147	Method and apparatus for the deacidification of library materials Term ended Term ended no later than Jun 6, 2015 · Low confidence	Term ended	Term ended no later than Jun 6, 2015	Low confidence
US 5,770,148	Method and apparatus for the deacidification of library materials Term ended Term ended no later than Jun 23, 2018 · Low confidence	Term ended	Term ended no later than Jun 23, 2018	Low confidence
US 5,956,860	Method and apparatus for the deacidification of library materials Term ended Term ended no later than Sep 28, 2019 · Low confidence	Term ended	Term ended no later than Sep 28, 2019	Low confidence