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Patent
   D399944
Priority
Apr 26 1996
Filed
Apr 26 1996
Issued
Oct 20 1998
Expiry
Oct 20 2012
Inventors
Gillingham…
Assg.orig
Donaldson …
Assg.curr
Donaldson …
Entity
unknown
Referenced by
130
References
19
Maint.:
n/a
The ornamental design for a conical filter, as shown and described.

FIG. 1 shows a perspective view of an embodiment of a conical filter, according to the principles of the present invention;

FIG. 2 shows a side elevational view thereof, the other sides being identical to that shown;

FIG. 3 shows a top plan view thereof; and,

FIG. 4 shows a bottom plan view thereof.
INVENTORS:

Gillingham, Gary R., Wagner, Wayne M., Risch, Daniel T., Tokar, Joseph C., Rothman, Jim C., Carter, Steven A.

THIS PATENT IS REFERENCED BY THESE PATENTS:
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ASSIGNMENT RECORDS    Assignment records on the USPTO
///////
Executed onAssignorAssigneeConveyanceFrameReelDoc
Apr 26 1996Donaldson Company, Inc.(assignment on the face of the patent)
Jun 19 1996WAGNER, WAYNE M Donaldson Company, IncASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0081790400 pdf
Jun 19 1996RISCH, DANIEL T Donaldson Company, IncASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0081790400 pdf
Jun 19 1996CARTER, STEVEN A Donaldson Company, IncASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0081790400 pdf
Jun 20 1996GILLINGHAM, GARY R Donaldson Company, IncASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0081790400 pdf
Jun 20 1996TOKAR, JOSEPH C Donaldson Company, IncASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0081790400 pdf
Jul 12 1996ROTHMAN, JIM C Donaldson Company, IncASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0081790400 pdf
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