PTO
Wrapper
PDF
|
Dossier
Espace
Google
|
|
Patent
D312691
|
Priority
Dec 16 1987
|
Filed
Dec 16 1987
|
Issued
Dec 04 1990
|
Expiry
Dec 04 2004
|
|
Assg.orig
|
|
Entity
unknown
|
0
|
2
|
n/a
|
|
|
The ornamental design for a threaded heatless concentrator, as shown and described.
|
FIG. 1 is a front elevational view of a threaded heatless concentrator,
showing my new design;
FIG. 2 is a side elevational view thereof, turned 90° with respect
to FIG. 1;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof; and
FIG. 5 is a perspective view thereof.
Spock, Paul S.
Patent |
Priority |
Assignee |
Title |
Date |
Maintenance Fee Events |
n/a
Date |
Maintenance Schedule |
n/a