Inventor · disambiguated record
Mary Beth Letscher
Also filed as: LETSCHER MARY B · LETSCHER MARY B K · LETSCHER MARY BETH
9 granted patents·192 citations·filing 1990–1994
89Inventor score
Top patents by PatentIndex Score
9 records- 0193US5626718AUse of polymers in the recycled fiber washing/deinking processBETZ LABORATORIES·Filed 1994·Granted May 6, 1997·98 cites·32 claims
- 0268US5200034AUse of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1991·Granted Apr 6, 1993·27 cites·9 claims
- 0365US5141598AProcess and composition for deinking dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1991·Granted Aug 25, 1992·17 cites·8 claims
- 0455US5248388AUse of surfactants having an HLB less than 10 in the deinking of dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1992·Granted Sep 28, 1993·18 cites·13 claims
- 0554US5094716AUse of anionic surfactant/dispersant blends for the deinking of groundwood newsprintBETZ PAPERCHEM INC·Filed 1990·Granted Mar 10, 1992·13 cites·11 claims
- 0643US5281348AUse of anionic surfactant/dispersant blends for the deinking of groundwood newsprintBETZ PAPERCHEM INC·Filed 1991·Granted Jan 25, 1994·7 cites·5 claims
- 0741US5302242AProcess and composition for deinking dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1992·Granted Apr 12, 1994·7 cites·8 claims
- 0835US5282997AProcess and composition for deinking dry toner electrostatic printed wastepaperBETZ PAPERCHEM INC·Filed 1992·Granted Feb 1, 1994·4 cites·5 claims
- 0929US5387355AUse of anionic surfactant/dispersant blends for the deinking of groundwood newsprintBETZ LABORATORIES·Filed 1994·Granted Feb 7, 1995·1 cites·4 claims
Join the waitlist — get patent alerts
Get an alert when Mary Beth Letscher files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →