Ellipsoidal reflector lamp
CA 1095575 A · Owner: General Electric Company · Inventors: La Giusa, Frank F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blown glass reflector lamp having an ellipsoidal reflector and a clear or lightly frosted face is disclosed. The lamp bulb is blown in the shape of half of an ellipsoid the eccentricity of the ellipsoid being within the range of 0.88 to 0.66, inclusive, The face of the bulb closing the ellipsoid can be clear or, preferably, lightly frosted. An elongated neck is provided to separate the base from the filament to enable the base to remain cooler during lamp operation. The length of the neck can be reduced if a heatreflecting shield is inserted within the neck around the mount. The reflective layer terminates at approximately the minor diameter of the ellipsoid, so that the direct light and …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 10, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.