Cement finisher's knee board

Details Cement finisher's knee board Cement finisher's knee board

1987-08-17

1988-12-06

Britts, Ramon S.

Fire escape, ladder, or scaffold

Miscellaneous

2 24, 5443, 248346, 4283144, D29 10, E04G 100

Patent

active

047890460

ABSTRACT:
A rigid light weight knee board for cement finishers. The body of the knee board comprises a high density extruded closed cell polystyrene foam. A water repellent cover made from soft pliable vinyl is provided for the board and includes an upright handle strap.

REFERENCES:
patent: 830103 (1906-09-01), Rundell
patent: 2448427 (1948-08-01), Gordon
patent: 2476565 (1949-07-01), Russell
patent: 2719576 (1955-10-01), Emmett
patent: 3112812 (1963-12-01), Ramon
patent: 3319273 (1967-05-01), Solin
patent: 3346877 (1967-10-01), Zirves
patent: 3544054 (1970-12-01), Ward
patent: 4043424 (1977-08-01), Crain
patent: 4346784 (1982-08-01), Hammond
patent: 4423694 (1984-01-01), Senneville
patent: 4673216 (1987-06-01), Alfer
Dow Chemical Company: "Styrofoam Brand Insulation Products For Walls, Foundations and Roofs, 07200/DOt, Buyline 2930".
Dow Chemical Company: "If You Need It . . . We've Got It".
"Cut Foundation Heat Loss For Comfort-Dow Chemical Company: Able Salabe Homes-Install StyrofoamTG".
Dow Chemical Company: "If You Need It . . . We've Got It".
"Cut Foundation Heat Loss For Comfort-Dow Chemical Company: Able Salable Homes-Install Styrofoam TG".

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