Sterlite Technologies has patented a method for fabricating a glass preform involving the production of soot particles in a combustion chamber, agglomeration, separation from impurities in a cyclone separator, collection, compaction with a preform compaction chamber, and sintering in a furnace. The process ensures efficient preform formation. GlobalData’s report on Sterlite Technologies gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Sterlite Technologies, was a key innovation area identified from patents. Sterlite Technologies's grant share as of February 2024 was 53%. Grant share is based on the ratio of number of grants to total number of patents.
Method for fabrication of glass preform using soot particles
The granted patent (Publication Number: US11912604B2) discloses a method for fabricating a glass preform involving several steps. The process begins with the production of soot particles in a combustion chamber using a precursor material, followed by agglomeration of the particles in agglomerator tubes, separation of impurities in a cyclone separator, and collection in a soot collection chamber. The soot particles are then compacted in a preform compaction chamber with the continuous facilitation of a dehydration gas, chlorine. Subsequently, the compacted soot particles undergo sintering, resulting in the formation of the glass preform.
The method outlined in the patent involves the use of silicon tetrachloride (SiCl4) as the precursor material, which upon heating produces impurities such as HCl and water vapors. The agglomerator tubes are surrounded by a cooling layer to facilitate the cooling of the soot particles. Additionally, the compaction of the soot particles can be achieved through various processes like uniaxial compaction, cold isostatic compaction, or hot isostatic compaction. Furthermore, the dehydration gas used during compaction helps in removing OH ion concentration from the soot preform, ultimately leading to the generation of the glass preform through sintering at high temperatures ranging from 1500° Celsius to 1600° Celsius in a controlled atmospheric furnace.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
