Pleat spacer for air filter

Details Pleat spacer for air filter Pleat spacer for air filter

1997-11-12

2002-12-31

Lichtenstein, Lisa (Department: 2911)

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Air treatment

Design Patent

active

D0468007

CLAIM:
The ornamental design for a pleat spacer for air filter, as shown and described.

REFERENCES:
patent: 2135863 (1938-11-01), Walker
patent: 3138443 (1964-06-01), Engle et al.
patent: 3606739 (1971-09-01), Peterson
patent: 3789589 (1974-02-01), Delaney et al.
patent: 3869392 (1975-03-01), Wolf
patent: 4133661 (1979-01-01), Strnad
patent: 4488966 (1984-12-01), Schaeffer
patent: 4547950 (1985-10-01), Thompson
patent: 4617122 (1986-10-01), Kruse et al.
patent: 4701196 (1987-10-01), Delany
patent: 4963171 (1990-10-01), Osendorf
patent: 5273563 (1993-12-01), Pasch et al.
patent: 5273564 (1993-12-01), Hill
patent: 5290345 (1994-03-01), Osendorf et al.
patent: 1073826 (1980-03-01), None
Declaration of Richard J. Osendorf with Exhibits A-C.

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