Patents by Inventor Mariana Pokrass
Mariana Pokrass 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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Publication number: 20240092033Abstract: Novel support material formulations, characterized as providing a cured support material with improved dissolution rate, while maintaining sufficient mechanical strength, are disclosed. The formulations comprise a water-miscible non-curable polymer, a first water-miscible, curable material and a second, water-miscible material that is selected capable of interfering with intermolecular interactions between polymeric chains formed upon exposing the first water-miscible material to curing energy. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.Type: ApplicationFiled: November 28, 2023Publication date: March 21, 2024Applicant: Stratasys Ltd.Inventors: Yuval VIDAVSKY, Dani PERI, Mariana POKRASS, Avraham LEVY, Eynat MATZNER
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Patent number: 11850802Abstract: Novel support material formulations, characterized as providing a cured support material with improved dissolution rate, while maintaining sufficient mechanical strength, are disclosed. The formulations comprise a water-miscible non-curable polymer, a first water-miscible, curable material and a second, water-miscible material that is selected capable of interfering with intermolecular interactions between polymeric chains formed upon exposing the first water-miscible material to curing energy. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.Type: GrantFiled: December 6, 2021Date of Patent: December 26, 2023Assignee: Stratasys Ltd.Inventors: Yuval Vidavsky, Dani Peri, Mariana Pokrass, Avraham Levy, Eynat Matzner
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Publication number: 20230391998Abstract: Curable formulations which are usable in additive manufacturing of three-dimensional objects using a transparent material, and which can be advantageously usable in additive manufacturing systems that utilize a LED curing source are provided. Additive manufacturing processes using same and objects made thereby are also provided.Type: ApplicationFiled: October 21, 2021Publication date: December 7, 2023Applicant: Stratasys Ltd.Inventors: Lev KUNO, Mariana POKRASS, Elena SHPAYZER, Dani PERI
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Publication number: 20230391002Abstract: A method of treating an object fabricated from a modeling material by additive manufacturing, comprises exposing the object to visible light having a peak wavelength less than 470 nm, and to a temperature of less than a heat deflection temperature (HDT) of the modeling material.Type: ApplicationFiled: October 21, 2021Publication date: December 7, 2023Applicant: Stratasys Ltd.Inventors: Lev KUNO, Mariana POKRASS, Diana RAVICH, Gil SHELEF
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Patent number: 11780172Abstract: Curable formulations which form cured materials that are breakable upon immersion in water are disclosed. The cured materials break into a plurality of particles being a few millimeters or less in size. Methods of fabricating three-dimensional objects utilizing the curable formulations are also disclosed, as well as model objects fabricated thereby. The curable formulations include at least a mono-functional curable material and a multi-functional curable material, as described in the specification.Type: GrantFiled: April 28, 2021Date of Patent: October 10, 2023Assignee: Stratasys Ltd.Inventors: Tal Ely, Mariana Pokrass, Dani Peri, Avraham Levy, Dana Tenne
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Publication number: 20220324179Abstract: A method of additive manufacturing (AM) includes dispensing a first building material formulation to form an outer region, and dispensing a second building material formulation to form an inner region, the outer region surrounding the inner region, the inner and outer regions being shaped to form a layer of the object; exposing the layer to a first curing condition, repeating the dispensing and the exposing to sequentially form a plurality of layers of the object and collectively exposing the plurality of layers to a second curing condition. The selections are such that the first building material formulation is hardened to a higher degree than the second building formulation. The outer regions form a hardened coating that at least partially encapsulates the inner regions. The second curing condition is other than the first curing condition and is selected to increase the degree that the inner region is hardened.Type: ApplicationFiled: June 22, 2022Publication date: October 13, 2022Applicant: Stratasys Ltd.Inventors: Mariana POKRASS, Lev KUNO, Eviatar GOLAN, Oren ZORAN
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Patent number: 11458723Abstract: Novel support material formulations, characterized as providing a cured support material which is readily removable by contacting with water, are disclosed. The formulations comprise a curable water-soluble mono-functional monomer, a water-miscible polymer and a silicone polyether. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.Type: GrantFiled: August 10, 2020Date of Patent: October 4, 2022Assignee: Stratasys Ltd.Inventors: Ira Yudovin-Farber, Avraham Levy, Mariana Pokrass
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Patent number: 11376799Abstract: A method of additive manufacturing (AM) includes dispensing a first building material formulation to form an outer region, and dispensing a second building material formulation to form an inner region, the outer region surrounding the inner region, the inner and outer regions being shaped to form a layer of the object; exposing the layer to a first curing condition, repeating the dispensing and the exposing to sequentially form a plurality of layers of the object and collectively exposing the plurality of layers to a second curing condition. The selections are such that the first building material formulation is hardened to a higher degree than the second building formulation. The outer regions form a hardened coating that at least partially encapsulates the inner regions. The second curing condition is other than the first curing condition and is selected to increase the degree that the inner region is hardened.Type: GrantFiled: September 27, 2019Date of Patent: July 5, 2022Assignee: Stratasys Ltd.Inventors: Mariana Pokrass, Lev Kuno, Eviatar Golan, Oren Zoran
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Publication number: 20220134640Abstract: Formulations usable in additive manufacturing such as 3D inkjet printing which provide a transparent material when hardened, are provided. The formulation are designed so as to provide transparent objects or parts thereof with improved transmittance and color properties such as yellowness index, compared to commercially available formulations. The formulations comprise a photoinitiator at a relatively low amount and designed mixture of curable materials.Type: ApplicationFiled: January 19, 2022Publication date: May 5, 2022Applicant: Stratasys Ltd.Inventors: Avraham LEVY, Diana RAVICH, Elena SHPAYZER, Mariana POKRASS
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Publication number: 20220088884Abstract: Novel support material formulations, characterized as providing a cured support material with improved dissolution rate, while maintaining sufficient mechanical strength, are disclosed. The formulations comprise a water-miscible non-curable polymer, a first water-miscible, curable material and a second, water-miscible material that is selected capable of interfering with intermolecular interactions between polymeric chains formed upon exposing the first water-miscible material to curing energy. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.Type: ApplicationFiled: December 6, 2021Publication date: March 24, 2022Applicant: Stratasys Ltd.Inventors: Yuval VIDAVSKY, Dani PERI, Mariana POKRASS, Avraham LEVY, Eynat MATZNER
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Patent number: 11207839Abstract: Novel support material formulations, characterized as providing a cured support material with improved dissolution rate, while maintaining sufficient mechanical strength, are disclosed. The formulations comprise a water-miscible non-curable polymer, a first water-miscible, curable material and a second, water-miscible material that is selected capable of interfering with intermolecular interactions between polymeric chains formed upon exposing the first water-miscible material to curing energy. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.Type: GrantFiled: August 14, 2016Date of Patent: December 28, 2021Assignee: Stratasys Ltd.Inventors: Yuval Vidavsky, Dani Peri, Mariana Pokrass, Avraham Levy, Eynat Matzner
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Publication number: 20210354398Abstract: A method of additive manufacturing (AM) includes dispensing a first building material formulation to form an outer region, and dispensing a second building material formulation to form an inner region, the outer region surrounding the inner region, the inner and outer regions being shaped to form a layer of the object; exposing the layer to a first curing condition, repeating the dispensing and the exposing to sequentially form a plurality of layers of the object and collectively exposing the plurality of layers to a second curing condition. The selections are such that the first building material formulation is hardened to a higher degree than the second building formulation. The outer regions form a hardened coating that at least partially encapsulates the inner regions. The second curing condition is other than the first curing condition and is selected to increase the degree that the inner region is hardened.Type: ApplicationFiled: September 27, 2019Publication date: November 18, 2021Applicant: Stratasys Ltd.Inventors: Mariana POKRASS, Lev KUNO, Eviatar GOLAN, Oren ZORAN
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Patent number: 11167499Abstract: Novel cleaning compositions, usable for removing a cured support material from a printed object obtained by additive manufacturing such as 3D inkjet printing are provided. The cleaning compositions are aqueous alkaline compositions containing a combination of two alkaline substances: an alkali metal hydroxide and an alkali metal silicate, each at a concentration of no more than 3 weight percents of the total weight of the composition. The cleaning compositions are characterized by high and constant dissolution rate, and are particularly useful for removing a cured support material that includes cross-linked polymeric chains such as cross-linked polyacrylate chains. Kits comprising the alkaline substances, and methods of fabricating a three-dimensional model object which utilize the cleaning compositions or the kits, and a three-dimensional model object fabricated thereby, are also provided.Type: GrantFiled: August 14, 2016Date of Patent: November 9, 2021Assignee: Stratasys Ltd.Inventor: Mariana Pokrass
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Publication number: 20210253766Abstract: Curable formulations which form cured materials that are breakable upon immersion in water are disclosed. The cured materials break into a plurality of particles being a few millimeters or less in size. Methods of fabricating three-dimensional objects utilizing the curable formulations are also disclosed, as well as model objects fabricated thereby. The curable formulations include at least a mono-functional curable material and a multi-functional curable material, as described in the specification.Type: ApplicationFiled: April 28, 2021Publication date: August 19, 2021Applicant: Stratasys Ltd.Inventors: Tal ELY, Mariana POKRASS, Dani PERI, Avraham LEVY, Dana TENNE
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Patent number: 11028205Abstract: Curable formulations which form cured materials that are breakable upon immersion in water are disclosed. The cured materials break into a plurality of particles being a few millimeters or less in size. Methods of fabricating three-dimensional objects utilizing the curable formulations are also disclosed, as well as model objects fabricated thereby. The curable formulations include at least a mono-functional curable material and a multi-functional curable material, as described in the specification.Type: GrantFiled: January 15, 2017Date of Patent: June 8, 2021Assignee: Stratasys Ltd.Inventors: Tal Ely, Mariana Pokrass, Dani Peri, Avraham Levy, Dana Tenne
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Publication number: 20210070941Abstract: Formulations usable in additive manufacturing, 3D inkjet printing in particular, of a three-dimensional object that contains a polyimide material, and additive manufacturing utilizing same are provided. The formulations contain a polyimide precursor (e.g., a bismaleimide) and an additional curable material, which is a multifunctional curable material, and are devoid of an organic solvent.Type: ApplicationFiled: December 27, 2018Publication date: March 11, 2021Applicant: Stratasys Ltd.Inventors: Lev KUNO, Mariana POKRASS, Elena SHPAYZER
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Publication number: 20210008793Abstract: A method of additive manufacturing of a three-dimensional object, comprises: dispensing from a first array of nozzles a modeling material formulation containing a polyimide precursor to form a layer in a configured pattern corresponding to a shape of a slice of the object; applying to the layer ultraviolet radiation and infrared radiation from two different radiation sources; and repeating the dispensing and the application of radiation to form a plurality of layers in configured patterns corresponding to shapes of other slices of the object. Optionally, an additional modeling material formulation or a support material formulation is dispensed from a second array of nozzles.Type: ApplicationFiled: December 27, 2018Publication date: January 14, 2021Applicant: Stratasys Ltd.Inventors: Mariana POKRASS, Omer SINWANI, Shai SULTAN, Lev KUNO, Gil SHELEF
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Publication number: 20200369020Abstract: Novel support material formulations, characterized as providing a cured support material which is readily removable by contacting with water, are disclosed. The formulations comprise a curable water-soluble mono-functional monomer, a water-miscible polymer and a silicone polyether. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.Type: ApplicationFiled: August 10, 2020Publication date: November 26, 2020Applicant: Stratasys Ltd.Inventors: Ira YUDOVIN-FARBER, Avraham LEVY, Mariana POKRASS
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Patent number: 10773512Abstract: Novel support material formulations, characterized as providing a cured support material which is readily removable by contacting with water, are disclosed. The formulations comprise a curable water-soluble mono-functional monomer, a water-miscible polymer and a silicone polyether. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.Type: GrantFiled: March 10, 2016Date of Patent: September 15, 2020Assignee: Stratasys Ltd.Inventors: Ira Yudovin-Farber, Avraham Levy, Mariana Pokrass
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Publication number: 20190119514Abstract: Novel support material formulations, characterized as providing a cured support material which is readily removable by contacting with water, are disclosed. The formulations comprise a curable water-soluble mono-functional monomer, a water-miscible polymer and a silicone polyether. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.Type: ApplicationFiled: March 10, 2016Publication date: April 25, 2019Inventors: Ira YUDOVIN-FARBER, Avraham LEVY, Mariana POKRASS