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BG42242A1
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Method for chemical activating of quartz sand
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BG41880A1
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Gel transit glass
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BG41886A1
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Method for preparing quatz glass ceramics
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BG41448A1
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Method for recuperating ceramic tubes of burners for sodium lamps operating on high pressure
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BG40719A1
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Glass for soldering ceramics with ferrite
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BG40548A1
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Method for eliminating absorption strip of electromelted quartz glass in ultra- violet range
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BG39762A1
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Method for determining gamma expositions
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BG38390A1
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Glass for soldering composition molybdenum- glass- covar
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BG36102A1
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Composition for mono- transition soldering of quartz glass with tungsten
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BG33794A1
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Lubricant for moulding of household glassware
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BG33795A1
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Method for improving the spectral transmission of quarz glass in ultraviolet field
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BG32917A1
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Method for couloring of copper containing glasses
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BG32918A1
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Method for laying of protective coating on glass fibers
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BG31844A1
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Composition of citalisating glass for welds beta al203- alphal203
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BG28130A1
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Method of obtaining of optical elements from glass with gradient of indice beam refraction
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BG28318A1
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Composition of lowmelting glass
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BG25701A1
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A glass composition resistent to metal sodium vapours
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BG25702A1
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A glass composition resistent to sodium vapours
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BG24720A1
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Method of increasing throughput capcaity of glass in ultraviolet portion of light spectrum
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BG24996A1
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A composition for the obtaining of semi-conductor and glass-ceramic structures
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