Patents by Inventor Ravinder C. Mehra
Ravinder C. Mehra 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: 6817256Abstract: The invention relates to a pipette sampling system that allows for automated sampling from the contents of a capped sample tube. More specifically, the invention relates to a pipette tip, having a piercing tip attached thereto, for removal of aliquots of samples from capped sample tubes comprising said samples.Type: GrantFiled: February 26, 2002Date of Patent: November 16, 2004Assignee: Alfa Wassermann, Inc.Inventors: Ravinder C. Mehra, Zygmunt M. Andrevski, Zvi G. Loewy
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Publication number: 20020134175Abstract: The invention relates to a pipette sampling system that allows for automated sampling from the contents of a capped sample tube. More specifically, the invention relates to a pipette tip, having a piercing tip attached thereto, for removal of aliquots of samples from capped sample tubes comprising said samples.Type: ApplicationFiled: February 26, 2002Publication date: September 26, 2002Inventors: Ravinder C. Mehra, Zygmunt M. Andrevski, Zvi G. Loewy
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Patent number: 5328058Abstract: The present invention is a dropper bottle assembly (30) with a dispensing closure (34) having a base (48) adapted to be secured to the bottle 32) and an elongated dropper spout (64) extending from the base (48) to a distal open end (72) and with a separate cap (36, 236) defining a cavity (76) sized to receive the spout (64) therein wherein the cap (36, 236) and closure (34) share cooperating hinge (80, 84) and lock structures (130, 132, 264) for pivotably mounting the cap (36, 236) about a fixed axis and locking the cap (36, 236) closed with the spout opening (72) closed off. The lock (130) and hinge (84) structure are formed on the spout (64) below the opening (72) thereof but spaced from the closure base (48).Type: GrantFiled: September 8, 1993Date of Patent: July 12, 1994Assignee: Nalge CompanyInventors: Richard A. Leoncavallo, Ravinder C. Mehra, Gregory R. Phillips
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Patent number: 5246145Abstract: A dropper bottle assembly with a dispensing closure having a base adapted to be secured to the bottle and an elongated dropper spout extending from the base to a distal open end and with a separate cap defining a cavity sized to receive the spout therein wherein the cap and closure share cooperating hinge and lock structures for pivotably mounting the cap about a fixed axis and locking the cap closed with the spout opening closed off. The lock and hinge structure are formed on the spout below the opening thereof but spaced from the closure base. The lock mechanism includes cooperating teeth and an index finger or a cooperating spring-arm and a grip bar. The spout is sealed by a surface of the cap or a compliant mat on that surface, the latter being held in place by a rib within the cap.Type: GrantFiled: February 26, 1992Date of Patent: September 21, 1993Assignee: Nalge CompanyInventors: Richard A. Leoncavallo, Ravinder C. Mehra, Gregory R. Phillips
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Patent number: 4993263Abstract: A plastic hydrometer of the constant mass variable displacement type. The hydrometer includes a separate bulbous section, stem and cap. The bulbous section is a single piece molded part having an upper end which mates with the lower end of the extruded tube.Type: GrantFiled: May 19, 1989Date of Patent: February 19, 1991Assignee: Nalge CompanyInventors: Ravinder C. Mehra, Paul V. Comeau
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Patent number: 4896783Abstract: A container and cap assembly comprising a receiving container and a cap for engagement therewith. Engagement means is provided for quick assembly or disassembly of the cap from the container which comprises at least two recesses in the cylindrical outer wall of the lower end of the cap for receiving corresponding locking pins on the cylindrical wall of the container. The recesses each comprise a first receiving portion and a locking portion. The locking pins each have a substantially elongated outer configuration with respect to longitudinal axis of the container.Type: GrantFiled: July 16, 1987Date of Patent: January 30, 1990Assignee: Manufacturers Hanover Trust CompanyInventors: Richard A. Leoncavallo, Peter K. Baird, Ravinder C. Mehra, Sharad Rajguru
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Patent number: 4861466Abstract: A pressure filter assembly having a bleed valve assembly for releasing trapped gas from with the filter chamber in a controlled manner. The bleed valve assembly includes a stem secured to the filter assembly having a bore therethrough for communication with the filter chamber and a cap for controlling the release of trapped gas within the filter chamber. The cap has a plunger with a contact surface which mates with a portion of the inside surface of the stem bore and an extension which fits with a narrow portion of the bore.Type: GrantFiled: April 14, 1988Date of Patent: August 29, 1989Assignee: Nalge CompanyInventors: Richard A. Leoncavallo, Gregory R. Phillips, Ravinder C. Mehra
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Patent number: 4858776Abstract: A plastic bottle closure assembly comprising a plastic bottle having a threaded neck portion, a closure for engagement with the neck portion and a sealing plug. The sealing plug has an annular mating surface designed to engage an annular planer mating surface of the neck portion. The closure is provided with annular rib for engaging the plug so as to cause the inner mating surface of the plug to engage the mating section of neck portion of the bottle.Type: GrantFiled: November 3, 1988Date of Patent: August 22, 1989Assignee: Nalge CompanyInventor: Ravinder C. Mehra
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Patent number: 4689147Abstract: A plastic filter assembly having an upper receiving container and a lower receiving container. Either the top or bottom container is provided with at least two recesses for receiving a locking pin in the container not having recesses. The recess has a first receiving portion and a locking portion. The locking pin has an angled engaging surface inclined with respect to longitudinal axis of the container.Type: GrantFiled: September 27, 1985Date of Patent: August 25, 1987Assignee: Nalge CompanyInventors: Richard A. Leoncavallo, Peter K. Baird, Ravinder C. Mehra, Sharad Rajguru
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Patent number: 4614585Abstract: A disposable filtration unit having a breakaway reservoir to facilitate recovery of the filter membrane.Type: GrantFiled: September 12, 1984Date of Patent: September 30, 1986Assignee: Sybron CorporationInventors: Ravinder C. Mehra, Robert G. Relyea, Peter K. Baird
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Patent number: 4588158Abstract: A single-piece, injection molded rack for holding test tubes or similar articles and a mold for producing the same. In a preferred three-tiered form, the intermediate tier is a lattice defined by the intersection of two superposed sets of parallel bars. These two sets of bars are formed by two pairs of correspondingly channeled slides that cooperatively engage to form a portion of the mold cavity corresponding to the lattice. The channels in each set of slides are aligned with the path of movement of the slides to permit their sliding, uniaxial movement relative to the molded bars. To further enable this sliding movement between mold segments and the molded rack, the connecting supports between the top tier and the intermediate tier are provided on the sides of the rack, while the connecting supports between the intermediate tier and the bottom tier are provided on the front and rear of the rack.Type: GrantFiled: August 26, 1985Date of Patent: May 13, 1986Assignee: Sybron CorporationInventor: Ravinder C. Mehra
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Patent number: 4588095Abstract: A single-piece, injection molded rack for holding test tubes or similar articles and a mold for producing the same. In a preferred three-tiered form, the intermediate tier is a lattice defined by the intersection of two superposed sets of parallel bars. These two sets of bars are formed by two pairs of correspondingly channeled slides that cooperatively engage to form a portion of the mold cavity corresponding to the lattice. The channels in each set of slides are aligned with the path of movement of the slides to permit their sliding, uniaxial movement relative to the molded bars. To further enable this sliding movement between mold segments and the molded rack, the connecting supports between the top tier and the intermediate tier are provided on the sides of the rack, while the connecting supports between the intermediate tier and the bottom tier are provided on the front and rear of the rack.Type: GrantFiled: November 10, 1983Date of Patent: May 13, 1986Assignee: Sybron CorporationInventor: Ravinder C. Mehra
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Patent number: 4394266Abstract: Disclosed is a pressure adapter and containment vessel for converting a vacuum filter unit to use as a pressure filter. The containment vessel includes an off center well in the bottom of the vessel for supporting the filter unit, the off center well also providing a variable spacing between the wall of the containent vessel and the outlet spout of the filter unit. In addition, the containment vessel has a screw closure which cooperates with the cap of the filter unit to insure the filter unit is not pressurized until after the screw closure is properly attached to the containment vessel.Type: GrantFiled: November 16, 1981Date of Patent: July 19, 1983Assignee: Sybron CorporationInventors: Ravinder C. Mehra, Raj K. Aggarwal
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Patent number: 4357240Abstract: A disposable filtration unit wherein the body of the unit is a unitary, one-piece molded structure having an internal flange for dividing the unit into an upper and lower chambers, the flange also providing means for supporting the filter medium.Type: GrantFiled: February 27, 1981Date of Patent: November 2, 1982Assignee: Sybron CorporationInventors: Ravinder C. Mehra, Heinz W. Hahn, Raj K. Aggarwal
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Patent number: D257390Type: GrantFiled: July 7, 1978Date of Patent: October 14, 1980Assignee: Sybron CorporationInventors: Heinz W. Hahn, Ravinder C. Mehra
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Patent number: D270947Type: GrantFiled: March 2, 1981Date of Patent: October 11, 1983Assignee: Sybron CorporationInventors: Ravinder C. Mehra, Heinz W. Hahn, Raj K. Aggarwal
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Patent number: D284700Type: GrantFiled: November 10, 1983Date of Patent: July 15, 1986Assignee: Sybron CorporationInventors: Ravinder C. Mehra, Richard A. Leoncavallo
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Patent number: D297860Type: GrantFiled: October 18, 1985Date of Patent: September 27, 1988Assignee: Nalge CompanyInventors: Richard A. Leoncavallo, Peter K. Baird, Ravinder C. Mehra, Sharad R. Rajguru
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Patent number: D338830Type: GrantFiled: December 9, 1991Date of Patent: August 31, 1993Assignee: Nalge CompanyInventors: Richard A. Leoncavallo, Ravinder C. Mehra, Gregory R. Phillips
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Patent number: D358530Type: GrantFiled: January 14, 1994Date of Patent: May 23, 1995Assignee: Nalge CompanyInventors: Ravinder C. Mehra, Richard A. Leoncavallo, Mark Giverc