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Patent
   D251383
Priority
May 18 1977
Filed
May 18 1977
Issued
Mar 20 1979
Expiry
Mar 20 1993
Inventors
Hansen, Ge…
Assg.orig
Crane Co.
Assg.curr
Crane Co.
Entity
unknown
Referenced by
3
References
5
Maint.:
n/a
The ornamental design for a butterfly valve, as shown.

FIG. 1 is a front elevational view of a butterfly valve showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

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

Hansen, George E., McInerney, John A.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D872836, Oct 03 2018 A R ARENA PRODUCTS, INC Butterfly valve
D873966, Feb 16 2018 ASAHI YUKIZAI CORPORATION Butterfly valve
ER6193,
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
2122560,
3485476,
4007910, Nov 30 1972 Kubota, Ltd. Butterfly valve apparatus
198885,
198886,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
May 18 1977Crane Co.(assignment on the face of the patent)
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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