Patents by Inventor Boris Gromann
Boris Gromann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11952303Abstract: A quartz glass body and a process for the preparation of a quartz glass body is disclosed. One process includes providing a silicon dioxide granulate from a pyrogenic silicon dioxide powder, making a glass melt out of the silicon dioxide granulate and making a quartz glass body out of at least part of the glass melt. In at least one process a silicon component different from silicon dioxide is added. A quartz glass body is obtainable by this process. A light guide, an illuminant and a formed body, are each obtainable by further processing of the quartz glass body.Type: GrantFiled: December 16, 2016Date of Patent: April 9, 2024Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Nigel Robert Whippey, Marcus Constantin Göbel, Boris Gromann, Gerrit Scheich
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Patent number: 11919794Abstract: In a method of manufacturing a tube of quartz glass by molding a hollow cylinder having a wall thickness of at least 20 mm, the cylinder is continuously fed under rotation about a rotational axis into a heating zone at a relative feed rate VC, softened and radially expanded under the effect of a gas pressure. A tube strand is continuously formed and is withdrawn at a withdrawal rate VT. In order to mold thick-walled initial hollow cylinders of quartz glass into tubes with larger diameter, the gas pressure is used as an actuating variable of a diameter regulation for the tube outer diameter or for a geometrical correlated parameter thereof, and in a pressure build-up phase the gas pressure is gradually increased from a lower initial value to a higher final value, and that the following applies to the ratio of VC and VT:VT=VC±0.2·VC.Type: GrantFiled: March 29, 2022Date of Patent: March 5, 2024Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias Söhn, Boris Gromann, Eduard Visnow
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Patent number: 11708290Abstract: One aspect relates to a process for the preparation of a quartz glass body, including providing a silicon dioxide granulate, wherein the silicon dioxide granulate was made from pyrogenic silicon dioxide powder and the silicon dioxide granulate has a BET surface area in a range from 20 to 40 m2/g, making a glass melt out of silicon dioxide granulate in an oven and making a quartz glass body out of at least part of the glass melt. The oven has at least a first and a further chamber connected to one another via a passage. The temperature in the first chamber is lower than the temperature in the further chambers. On aspect relates to a quartz glass body which is obtainable by this process. One aspect relates to a light guide, an illuminant and a formed body, which are each obtainable by further processing of the quartz glass body.Type: GrantFiled: August 4, 2020Date of Patent: July 25, 2023Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias Otter, Walter Lehmann, Michael Hünermann, Nils Christian Nielsen, Nigel Robert Whippey, Boris Gromann, Abdoul-Gafar Kpebane, Matthias Söhn
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Patent number: 11492282Abstract: One aspect relates to a process for the preparation of a quartz glass body. The process includes providing silicon dioxide particles, making a glass melt out of the silicon dioxide particles in an oven and making a quartz glass body out of at least part of the glass melt. The oven has a gas outlet through which gas is removed from the oven, wherein the dew point of the gas on exiting the oven through the gas outlet is less than 0° C. One aspect further relates to a quartz glass body which is obtainable by this process. One aspect further relates to a light guide, an illuminant and a formed body, which are each obtainable by further processing of the quartz glass body.Type: GrantFiled: December 16, 2016Date of Patent: November 8, 2022Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Nigel Robert Whippey, Boris Gromann, Matthias Söhn
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Publication number: 20220306513Abstract: In a method of manufacturing a tube of quartz glass by molding a hollow cylinder having a wall thickness of at least 20 mm, the cylinder is continuously fed under rotation about a rotational axis into a heating zone at a relative feed rate VC, softened and radially expanded under the effect of a gas pressure. A tube strand is continuously formed and is withdrawn at a withdrawal rate VT. In order to mold thick-walled initial hollow cylinders of quartz glass into tubes with larger diameter, the gas pressure is used as an actuating variable of a diameter regulation for the tube outer diameter or for a geometrical correlated parameter thereof, and in a pressure build-up phase the gas pressure is gradually increased from a lower initial value to a higher final value, and that the following applies to the ratio of VC and VT:VT=VC±0.2·VC.Type: ApplicationFiled: March 29, 2022Publication date: September 29, 2022Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias SÖHN, Boris GROMANN, Eduard VISNOW
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Patent number: 11299417Abstract: The invention relates to a process for preparing a quartz glass body comprising the process steps i.) Providing a silicon dioxide granulate, ii.) Making a glass melt from the silicon dioxide granulate in a melting crucible, and iii.) Making a quartz glass body from at least a part of the glass melt, wherein the melting crucible is comprised in an oven and is made of at least one material comprising tungsten or molybdenum or a combination thereof. The invention further relates to a quartz glass body which can be obtained by this process. Further, the invention relates to a light guide, an illuminant and a formed body, each of which can be obtained by processing the quartz glass body further.Type: GrantFiled: December 16, 2016Date of Patent: April 12, 2022Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias Otter, Walter Lehmann, Michael Hünermann, Nils Christian Nielsen, Nigel Robert Whippey, Boris Gromann, Abdoul-Gafar Kpebane
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Publication number: 20200361806Abstract: One aspect relates to a process for the preparation of a quartz glass body, including providing a silicon dioxide granulate, wherein the silicon dioxide granulate was made from pyrogenic silicon dioxide powder and the silicon dioxide granulate has a BET surface area in a range from 20 to 40 m2/g, making a glass melt out of silicon dioxide granulate in an oven and making a quartz glass body out of at least part of the glass melt. The oven has at least a first and a further chamber connected to one another via a passage. The temperature in the first chamber is lower than the temperature in the further chambers. On aspect relates to a quartz glass body which is obtainable by this process. One aspect relates to a light guide, an illuminant and a formed body, which are each obtainable by further processing of the quartz glass body.Type: ApplicationFiled: August 4, 2020Publication date: November 19, 2020Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias OTTER, Walter LEHMANN, Michael HÜNERMANN, Nils Christian NIELSEN, Nigel Robert WHIPPEY, Boris GROMANN, Abdoul-Gafar KPEBANE, Matthias SÖHN
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Patent number: 10730780Abstract: One aspect relates to a process for the preparation of a quartz glass body, including providing a silicon dioxide granulate, wherein the silicon dioxide granulate was made from pyrogenic silicon dioxide powder and the silicon dioxide granulate has a BET surface area in a range from 20 to 40 m2/g, making a glass melt out of silicon dioxide granulate in an oven and making a quartz glass body out of at least part of the glass melt. The oven has at least a first and a further chamber connected to one another via a passage. The temperature in the first chamber is lower than the temperature in the further chambers. One aspect relates to a quartz glass body which is obtainable by this process. One aspect relates to a light guide, an illuminant and a formed body, which are each obtainable by further processing of the quartz glass body.Type: GrantFiled: December 16, 2016Date of Patent: August 4, 2020Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias Otter, Walter Lehmann, Michael Hünermann, Nils Christian Nielsen, Nigel Robert Whippey, Boris Gromann, Abdoul-Gafar Kpebane, Matthias Söhn
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Publication number: 20200165151Abstract: A method and apparatus for manufacturing a quartz glass ingot of large cross-sectional area by continuous flame-fusion whereby on-line crack-free cutting of the ingot is ensured by using the internal heat of the ingot to permit equilibration of the internal and surface temperatures while passing through one or more annealing chambers, thus ensuring controlled cooling to temperature at which it is possible to cut the ingot with a water-cooled saw.Type: ApplicationFiled: November 22, 2019Publication date: May 28, 2020Inventors: Alan MUNDY, Ian George SAYCE, Boris GROMANN
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Publication number: 20200123039Abstract: One aspect relates to a process for the preparation of a quartz glass body including: i.) providing a silicon dioxide granulate, ii.) making a first glass melt out of the silicon dioxide granulate, iii.) making a glass product out of at least one part of the glass melt, iv.) reducing the size of the glass product to obtain a quartz glass grain, v.) making a further glass melt from the quartz glass grain and vi.) making a quartz glass body out of at least one part of the further glass melt. Furthermore, one aspect relates to a quartz glass body obtainable by this process. Furthermore, one aspect relates to a reactor, which is obtainable by further processing of the quartz glass body.Type: ApplicationFiled: June 13, 2018Publication date: April 23, 2020Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Boris Gromann, Marcus Constantin Goebel, Nils Christian Nielsen, Michael Huenermann, Kathrin Wissel-Stoll
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Patent number: 10618833Abstract: The invention relates to a process for the preparation of a quartz glass grain comprising the process steps i.) Providing a silicon dioxide granulate from a pyrogenically produced silicon dioxide powder, ii.) Making a glass melt out of silicon dioxide granulate, iii.) Making a quartz glass body out of at least part of the glass melt and iv.) Reducing the size of the quartz glass body to obtain the quartz glass grain. The invention further relates to a quartz glass grain which is obtainable by this process. The invention further relates to opaque quartz glass bodies, which are obtainable by further processing of the quartz glass grain.Type: GrantFiled: December 16, 2016Date of Patent: April 14, 2020Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Martin Arndt, Matthias Otter, Walter Lehmann, Michael Hünermann, Nils Christian Nielsen, Nigel Robert Whippey, Boris Gromann, Abdoul-Gafar Kpebane
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Patent number: 10544056Abstract: A method and apparatus are provided for producing a tube of glass by zonewise heating and softening of a hollow cylinder by a movable heating zone while rotating about its rotation axis. The glass tube is continuously formed by radial expansion of the softened region under action of centrifugal force and/or internal overpressure applied in the hollow-cylinder bore. The method and apparatus make it possible to deform the hollow cylinder in a single or a small number of forming steps into a glass tube having a larger outer diameter and high dimensional accuracy by determining a circumferential position at which the wall thickness is comparatively small, and during heating and softening of the rotating hollow cylinder a coolant is dispensed from a coolant source onto the deformation zone only when or predominantly when the circumferential position having the comparatively small wall thickness passes the coolant source.Type: GrantFiled: March 26, 2018Date of Patent: January 28, 2020Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Boris Gromann, Matthias Söhn, Alexander Blumenau
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Patent number: 10315947Abstract: A method for forming a hollow cylinder, in a single step, into a quartz glass tube with a large outer diameter and high dimensional stability is provided. To produce the tube, the cylinder, while rotating, is softened in portions in a heating zone which is moved at a relative feed rate Va and the softened portion is radially expanded by a centrifugal force and/or internal overpressure applied in the hollow cylinder bore so as to form a deformation zone. The radial expansion of the softened portion is carried out at a location-dependent radial expansion rate Vr, the profile of which along the deformation zone has a maximum value Vr,max which is smaller than 20 cm/min. The temperature in a rear heating portion of the heating zone, assigned to the end of the deformation zone, is lower than in a front heating portion assigned to the beginning of the deformation zone.Type: GrantFiled: July 12, 2017Date of Patent: June 11, 2019Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Boris Gromann, Nigel Whippey
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Publication number: 20190119141Abstract: A quartz glass body and a process for the preparation of a quartz glass body is disclosed. In one aspect, the process includes providing a silicon dioxide granulate from a pyrogenic silicon dioxide powder, making a glass melt out of the silicon dioxide granulate and making a quartz glass body out of at least part of the glass melt. In at least one process a silicon component different from silicon dioxide is added. One aspect further relates to a quartz glass body which is obtainable by this process. A light guide, an illuminant and a formed body, are each obtainable by further processing of the quartz glass body.Type: ApplicationFiled: December 16, 2016Publication date: April 25, 2019Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Nigel Robert Whippey, Marcus Constantin Göbel, Boris Gromann, Gerrit Scheich
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Publication number: 20190092675Abstract: The invention relates to a process for the preparation of a quartz glass body comprising the process steps i.) Providing silicon dioxide particles, ii.) Making a glass melt out of the silicon dioxide particles in an oven and iii.) Making a quartz glass body out of at least part of the glass melt, wherein the oven has a gas outlet through which gas is removed from the oven, wherein the dew point of the gas on exiting the oven through the gas outlet is less than 0° C. The invention further relates to a quartz glass body which is obtainable by this process. The invention further relates to a light guide, an illuminant and a formed body, which are each obtainable by further processing of the quartz glass body.Type: ApplicationFiled: December 16, 2016Publication date: March 28, 2019Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Nigel Robert Whippey, Boris Gromann, Matthias Sohn
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Publication number: 20190092676Abstract: The invention relates to a process for the preparation of a quartz glass body comprising the process steps i.) Providing a silicon dioxide granulate, ii.) Making a glass melt from the silicon dioxide granulate in an oven, and iii.) Making a quartz glass body from at least a part of the glass melt, wherein the oven comprises a hanging sinter crucible. The invention also relates to a quartz glass body which is obtainable by this process. The invention further relates to a light guide, an illuminant and a formed body which are each obtainable by further processing the quartz glass body.Type: ApplicationFiled: December 16, 2016Publication date: March 28, 2019Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias OTTER, Walter LEHMANN, Michael HÜNERMANN, Nils Christian NIELSEN, Nigel Robert WHIPPEY, Boris GROMANN, Abdoul-Gafar KPEBANE
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Publication number: 20190092672Abstract: One aspect is an oven including a melting crucible with a crucible wall, a solids feed with an outlet, a gas inlet and a gas outlet, wherein in the melting crucible the gas inlet is arranged below the solids feed outlet and the gas outlet is arranged at the same height as or above the solids feed outlet. One aspect further relates to a process for making a quartz glass body, including providing and introducing a bulk material selected from silicon dioxide granulate and quartz glass grain into the oven and providing a gas, making a glass melt from the bulk material, and making a quartz glass body from at least a part of the glass melt. One aspect relates to a quartz glass body obtainable by this process and a light guide, an illuminant and a formed body which are each obtainable by processing the quartz glass body further.Type: ApplicationFiled: December 16, 2016Publication date: March 28, 2019Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Boris GROMANN, Nigel Robert WHIPPEY
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Publication number: 20190077672Abstract: One aspect is a process for the preparation of a quartz glass body including providing a silicon dioxide granulate wherein the provision includes providing silicon dioxide powder, and processing the silicon dioxide powder to obtain a silicon dioxide granulate. The silicon dioxide granulate has a larger particle diameter than the silicon dioxide powder. The processing includes processing the silicon dioxide powder to obtain a silicon dioxide granulate I, wherein the silicon dioxide granulate I has a first carbon content wC(1), treating the silicon dioxide granulate I with a reactant to obtain a silicon dioxide granulate II with a further carbon content wC(2), wherein the further carbon content wC(2) is less than the first carbon content wC(1), making a glass melt out of the silicon dioxide granulate and making a quartz glass body out of at least part of the glass melt.Type: ApplicationFiled: December 16, 2016Publication date: March 14, 2019Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias OTTER, Walter LEHMANN, Michael HÜNERMANN, Nils Christian NIELSEN, Nigel Robert WHIPPEY, Boris GROMANN, Abdoul-Gafar KPEBANE, Thomas KAYSER
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Publication number: 20190077688Abstract: One aspect relates to a process for the provision of a quartz glass body, including providing a silicon dioxide granulate, making a glass melt from the silicon dioxide granulate in an oven and making a quartz glass body from at least part of the glass melt. The oven includes a hanging metal sheet crucible. One aspect also relates to a quartz glass body which is obtainable by this process. One aspect further relates to a light guide, an illuminant and a formed body which are obtainable by processing the quartz glass body further.Type: ApplicationFiled: December 16, 2016Publication date: March 14, 2019Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias OTTER, Walter LEHMANN, Michael HÜNERMANN, Nils Christian NIELSEN, Nigel Robert WHIPPEY, Boris GROMANN, Abdoul-Gafar KPEBANE
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Publication number: 20190071344Abstract: The invention relates to a process for preparing a quartz glass body comprising the process steps i.) Providing a silicon dioxide granulate, ii.) Making a glass melt from the silicon dioxide granulate in a melting crucible, and iii.) Making a quartz glass body from at least a part of the glass melt, wherein the melting crucible is comprised in an oven and is made of at least one material comprising tungsten or molybdenum or a combination thereof. The invention further relates to a quartz glass body which can be obtained by this process. Further, the invention relates to a light guide, an illuminant and a formed body, each of which can be obtained by processing the quartz glass body further.Type: ApplicationFiled: December 16, 2016Publication date: March 7, 2019Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Matthias OTTER, Walter LEHMANN, Michael HÜNERMANN, Nils Christian NIELSEN, Nigel Robert WHIPPEY, Boris GROMANN, Abdoul-Gafar KPEBANE