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US 7,325,417 B2Granted
Glass composition with low visible and IR transmission
AssigneeGuardian Industries Corp.
InventorsKsenia A. Landa, Leonid Landa, Richard Hulme
Life of this patent
Estimating the term…
Abstract
A glass having a visible transmission of no greater than 28% and low IR transmission, and employing a colorant portion: total iron (expressed as Fe2O3): 0.7 to 1.8% cobalt oxide (e.g., Co3O4): 0.001 to 1.0% titanium oxide (e.g., TiO2): 0.25 to 3.0% selenium (e.g., Se): 0 to 0.0020% chromium oxide (e.g., Cr2O3): 0 to 0.010%.
Claims16
A method of making glass, the method comprising
- adding iron to a glass batch at least partially in the form of melite, and melting the glass batch to form a glass having a visible transmission (Lta) no greater than 28% and an IR transmission no greater than 7%;
- and
- wherein the glass includes a colorant portion comprising:
- total iron:
- 0.7 to 1.8%
- cobalt oxide:
- 0.001 to 1.0%
- titanium oxide:
- 0.25 to 3.0%
- chromium oxide:
- 0 to 0.010%.
8 more elements
A method of making glass, the method comprising
- adding iron to a glass batch at least partially in the form of melite, and melting the glass batch to form a glass having a visible transmission (Lta) no greater than 28%;
- and
- wherein the glass includes a colorant portion comprising:
- total iron:
- 0.7 to 1.8%
- cobalt oxide:
- 0.001 to 1.0%
- titanium oxide:
- 0.25 to 3.0%
- chromium oxide:
- 0 to 0.010%.
8 more elements
A method of making glass, the method comprising
- adding iron to a glass batch at least partially in the form of melite, and melting the glass batch to form a glass having a visible transmission (Lta) no greater than 28%;
- and
- wherein the glass includes a colorant portion comprising from 0 to 0.010% chromium oxide.
Dependencies are inferred from the claim text.