Patent
   D423538
Priority
Mar 25 1999
Filed
Mar 25 1999
Issued
Apr 25 2000
Expiry
Apr 25 2014
Assg.orig
Entity
unknown
3
14
n/a
The ornamental design of a sight glass, as shown and described.

FIG. 1 is a perspective view of the sight glass of my new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being a mirror image thereof;

FIG. 3 is a side elevational view of the left side thereof;

FIG. 4 is a side elevational view of the right side thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view of a first modification of the sight glass of my new design;

FIG. 8 is a front elevational view of FIG. 7, the rear elevational view being a mirror image thereof;

FIG. 9 is a side elevational view of the left side of FIG. 7;

FIG. 10 is a side elevational view of the right side of FIG. 7;

FIG. 11 is a top plan view of FIG. 7;

FIG. 12 is a bottom plan view of FIG. 7;

FIG. 13 is a perspective view of a second modification of the sight glass of my new design;

FIG. 14 is a front elevational view of FIG. 13, the rear elevational view being a mirror image thereof;

FIG. 15 is a side elevational view of the left side of FIG. 13;

FIG. 16 is a side elevational view of the right side of FIG. 13;

FIG. 17 is a top plan view of FIG. 13; and,

FIG. 18 is a bottom plan view of FIG. 13.

Dillon, Robert J.

Patent Priority Assignee Title
6499439, Jun 15 2001 Triad Metal Products Company Modular stamped sight glass assembly
D439261, Mar 25 1999 Sight glass
D818182, Oct 20 2015 Rotary aperture
Patent Priority Assignee Title
1724716,
1833971,
2301460,
2312542,
2620660,
2943530,
2961108,
3345870,
4099851, May 07 1976 Reading aid
4704983, Sep 04 1985 Victaulic Company of America; VICTAULIC COMPANY OF AMERICA, A CORP OF NJ Flow metering sight glass
5193032, Mar 19 1992 INNOVATIVE MEDICAL SERVICES, INC Universal prescription bottle instruction label magnifier
D260401, Nov 20 1978 CLOVERLINE, INC , THE, A CORP OF ILLINOIS Reading light magnifier, or the like
D276731, Jun 06 1983 Thermostat magnifier
D334940, Jul 19 1990 HENRY TECHNOLOGIES, INC Sight glass
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