USPatentGranted
S

Conical filter

Granted 14 Jul 1998 · no office action yet

Assignee: Donaldson Company, Inc.

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Inventors: Wayne M. Wagner, Daniel T. Risch, Joseph C. Tokar, Gary R. Gillingham +2 · Examiner: Lisa Lichtenstein · AU 291 · TC 2900

Application
Not granted yet
filed 7 Jan 1997
Publication
Not published
not published
Patent· this page
US D396098
granted 14 Jul 1998

Life of the patent

2 dated events
⤢ drag to zoomJan 1997Apr 1997Jul 1997Oct 1997Jan 1998Apr 1998Jul 1998Prosecution
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Description

1 parts
›FIG. 1 shows a perspective view of a…

FIG. 1 shows a perspective view of a conical filter, showing our new design;

FIG. 2 shows a bottom perspective view of the filter device shown in FIG. 1;

FIG. 3 shows a side elevational view of the filter device shown in FIG. 1;

FIG. 4 shows a top plan view of the filter device shown in FIG. 1;

FIG. 5 shows a bottom plan view of the filter device shown in FIG. 1;

FIG. 6 shows a cross-sectional view thereof taken along line 6--6 in FIG. 1;

FIG. 7 shows a perspective view of a conical filter showing a second embodiment of our new design;

FIG. 8 shows a bottom perspective view of the filter device shown in FIG. 7;

FIG. 9 shows a side elevational view of the filter device shown in FIG. 7;

FIG. 10 shows a top plan view of the filter device shown in FIG. 7;

FIG. 11 shows a bottom plan view of the filter device shown in FIG. 7;

FIG. 12 shows a cross-sectional view thereof, taken along line 12--12 in FIG. 7;

FIG. 13 shows a perspective view of a conical filter showing a third embodiment of our new design;

FIG. 14 shows a bottom perspective view of the filter device shown in FIG. 13;

FIG. 15 shows a side elevational view of the filter device shown in FIG. 13;

FIG. 16 shows a top plan view of the filter device shown in FIG. 13;

FIG. 17 shows a bottom plan view of the filter device shown in FIG. 13; and,

FIG. 18 shows a cross-sectional view thereof, taken along line 18--18 in FIG. 13.

The sole difference between the three embodiments resides in the appearance of the size of the diameter.

the grant prints no section headings; every part label below is ours, taken from that part's own first words

Claims

1 · 1 independent · depth 1
1 granted claims

Classifications

1 codes
USPC · US Patent Classification
D23/365

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Pendency
1.5 y
553 days filing → grant
Office actions
0
on the grant's record
Examiner
Lisa Lichtenstein
art unit 291 · TC 2900
Citations: 26 back · 0 forward

Chain of title

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