Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Hydrogel containing envelopes

Hydrogel containing envelopes

US Patent 5147646 · Granted Sep 15, 1992

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Formulation2025
Polymer for contact lenses2016
Polymers for contact lenses2016
Polymers for contact lenses2016
Polymers for contact lenses2015
Random block copolymers2007
Microgels1999
Solution polymerization to form sol of crosslinked particles1999
Porous solid material1998
Polyethylene oxide temperature - or fluid-sensitive shape memory device1995
Plant growth media comprising cross-linked hydrogel particles1995
Polymeric materials1993