Patents Assigned to Alcon Universal Ltd.
  • Patent number: 6284804
    Abstract: Suspension formulations containing dexamethasone and ciprofloxacin are disclosed. The formulations contain a nonionic polymer, a nonionic surfactant and an ionic tonicity agent, but are physically stable and easily re-suspended. The formulations are intended for topical application to the eye, ear or nose.
    Type: Grant
    Filed: August 10, 2000
    Date of Patent: September 4, 2001
    Assignee: Alcon Universal Ltd.
    Inventors: Onkar N. Singh, Haresh G. Bhagat
  • Patent number: 6270221
    Abstract: Optical characteristics of optical systems, such as the eye, are measured including vision defects of the eye using a collimated beam from a diode laser focused onto the anterior surface of the cornea of the eye for providing a finite source of secondary radiation on the retina of the eye, the image of which is close to a desired diffraction limited spot. The secondary radiation is reflected back from the retina as a reflected wavefront of radiation that passes through the eye and is directed onto a wavefront analyzer where distortions associated with the reflected wavefront are measured. By focusing on the cornea through a long focal length lens and thus converging the beam through a small angle, as opposed to typically focusing a collimated light onto the retina, the need for lenses or lens combinations, and the time required to adjust such to accommodate the differing vision of each patient is eliminated.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: August 7, 2001
    Assignee: Alcon Universal Ltd.
    Inventors: Junzhong Liang, James H. Burkhalter
  • Patent number: 6261283
    Abstract: A surgical system having a cassette with an aspirant collection chamber and an aspiration vent line that draws fluid from the aspirant collection chamber. The pressure within the collection chamber is maintained near ambient so that when the aspiration vent line is open, fluid flows from the collection chamber and into the aspiration line. Such a system does not require a second source of irrigation fluid, minimizes pressure surges into the irrigation fluid line and does not affect the fluidic performance of the aspiration system. In addition, various vent pressures can be achieved by varying the vertical position of the reservoir relative to the aspiration line.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: July 17, 2001
    Assignee: Alcon Universal Ltd.
    Inventors: Michael D. Morgan, Gary P. Sorensen
  • Patent number: 6258053
    Abstract: A phacoemulsification apparatus includes a needle that is hollow and terminates in an evacuation port and has a straight portion and a bent or angulated portion spaced from the evacuation port. The needle defines an inner channel that narrows from the evacuation port before, at or beyond the angulated portion. The outer surface of the needle is also configured to converge before, at or beyond the bent or angulated portion. A flexible infusion sleeve surrounds the needle longitudinally along the straight portion of the needle and terminates at an area proximal to or in the vicinity of the angulated portion.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: July 10, 2001
    Assignee: Alcon Universal, Ltd.
    Inventor: Richard J. Mackool
  • Patent number: 6255343
    Abstract: 2,2-Difluoro HETE derivatives and methods of their use for treating dry eye are disclosed.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: July 3, 2001
    Assignee: Alcon Universal Ltd.
    Inventor: David B. Belanger
  • Patent number: 6109572
    Abstract: An apparatus and method to elevate an infusion source, the pole of a control unit is increased by about thirty-two (32) cm to increase the height of an infusion bottle attached to a hanger on the pole during ophthalmic surgery including that performed with a phacoemulsification surgical handpiece. The control unit being for irrigation and suction lines that lead to the phacoemulsification surgical handpiece used to conduct eye surgery.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: August 29, 2000
    Assignee: Alcon Universal, Ltd.
    Inventors: Theodore A. Urban, Matthew A. Franks
  • Patent number: D437535
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: February 13, 2001
    Assignee: Alcon Universal Ltd.
    Inventors: Mikhail Boukhny, Grace C. Liao, Michael D. Lockwood, Mel M. Oliveira
  • Patent number: D447567
    Type: Grant
    Filed: December 2, 1999
    Date of Patent: September 4, 2001
    Assignee: Alcon Universal Ltd.
    Inventors: Brian G. Murphy, Leonard A. Rodriguez, Ken Shelton, Scott L. Conway, Earl F. Robinson