Sight glass applied in refrigeration system
Patent D606437 Issued on December 22, 2009. Estimated Expiration Date: 
December 22, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 22, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRefrigerant liquid indicator Sight glass apparatus In-line sight indicator D412454 Sight glass with check valve and filter Lower body of float gauge head Lower body of float guage head Sight glass apparatus Patent #: 7540187 InventorAssigneeApplicationNo. 29331148 filed on 01/21/2009US Classes:D10/101Liquid quantity levelExaminersPrimary: Davis, Antoine DAttorney, Agent or FirmForeign Patent References
ClaimsCLAIM The ornamental design for a sight glass applied in refrigeration system, substantially as shown and described. DescriptionFIG. 1 is a front view of a sight glass applied in refrigeration system comprising a new, original and ornamental design; FIG. 2 is a left-hand side view of a sight glass applied in refrigeration system comprising the new, original and ornamental design, the right-hand side view being a mirror image thereof; FIG. 3 is a top view of a sight glass applied in refrigeration system comprising the new, original and ornamental design; FIG. 4 is a bottom view of a sight glass applied in refrigeration system comprising the new, original and ornamental design; FIG. 5 is a perspective view of a sight glass applied in refrigeration system comprising the new, original and ornamental design; and, FIG. 6 is a rear view of a sight glass applied in refrigeration system comprising the new, original and ornamental design. Field of SearchMEASURING, REGULATING OR INDICATING INSTRUMENT, OR CASINGLiquid quantity level Dial gauge or meter Sight glass With guard or casing Boiler type Reflector or magnifier Transparent closure plate type Rotary only Escutcheon type support Reciprocating valves Planar strainer normal to flow path Including a packing element (e.g., gasket) Sight glass |
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