Inventor

LENCZEWSKI RICHARD J

US3 patents

⚠️ This page may combine multiple inventors who share the name “LENCZEWSKI RICHARD J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SPECRETE IP INC

2 patents

US5294255AMar 15, 1994

Pumpable backfill grout

SPECRETE IP INC74 citations92

US5302200AApr 12, 1994

Hydrating and plasticizing admixture for dense concrete

SPECRETE IP INC22 citations89

SMETANA DAVID A

1 patent

US5356446AOct 18, 1994

Low density insulating and fire-resistant perlite concrete

SMETANA DAVID A43 citations88