Identifying Patents (Class 283/70)
  • Patent number: 4889365
    Abstract: A counterfeit resistant label for goods is manufactured by selecting a code word from a plurality of possible code words to identify a particular label and desired information relative to the goods with which the label is to be associated, applying the code word as a series of marks in several but less than all of a plurality of predetermined locations on the face of the label using an ink that is sensitive to light in the nonvisible spectrum, and masking the visibility of the ink in light in the visible spectrum over substantially all of the predetermined locations.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: December 26, 1989
    Assignee: The Label Printers
    Inventor: Gerald A. Chouinard
  • Patent number: 4880750
    Abstract: An identification method, applicable to the identification of animals or inanimate objects, is described. The method takes advantage of a hithertofore unknown set of individual-specific, or IS antibodies, that are part of the unique antibody repertoire present in animals, by reacting an effective amount of IS antibodies with a particular panel, or n-dimensional array (where n is typically one or two) consisting of an effective amount of many different antigens (typically greater than one thousand), to give antibody-antigen complexes. The profile or pattern formed by the antigen-antibody complexes, termed an antibody fingerprint, when revealed by an effective amount of an appropriate detector molecule, is uniquely representative of a particular individual. The method can similarly by used to distinguish genetically, or otherwise similar individuals, or their body parts containing IS antibodies.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: November 14, 1989
    Assignee: Miragen, Inc.
    Inventor: Ann-Michele Francoeur
  • Patent number: 4874187
    Abstract: The invention comprises at least one page of information, a rigid support material with slightly deformable edges, and a transparent viewing enclosure. Placing insurance data on the form provides a method for inventory control of "soft" insurance products such as extended warranty contracts.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: October 17, 1989
    Assignee: National Electronics Warranty Corporation
    Inventor: Fredrick Schaufeld
  • Patent number: 4871193
    Abstract: In order, for example to produce solution noting/check-out sheets, such as are used in correspondence courses, so that a sheet of writing paper can be written on externally only up to the time when information concerning the correct solution to the problem is made known to the person writing on it, a sheet of writing paper comprises two sheets (1, 3) joined together on three edges (15) and an intermediate sheet (5). The intermediate sheet (5) ensures that when the paper is written on in a writing area (17) the information is transferred to one of the sheets (1, 3). An adhesive place (11) is provided between the sheets (1, 3) which does not adhere to the intermediate sheet (5) but indissolubly binds the two sheets (1, 3) when the intermediate sheet is removed.
    Type: Grant
    Filed: November 18, 1987
    Date of Patent: October 3, 1989
    Inventor: Gerhard A. Worndli
  • Patent number: 4846503
    Abstract: The present is a description of a method for color coding data carriers, such as labels, which comprise a substrate onto which several color code segments of various colorations have been deposited. In a programme controlled process it is possible to render the coloration of each individual color code segment unidentifiable so that the combination of the remaining color code segments yield the desired color code. In this way it is possible to carry out color coding using a single-color printer for instance.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: July 11, 1989
    Assignee: Seidl & Partner GmbH
    Inventor: Norbert Strauss
  • Patent number: 4830380
    Abstract: A printed upon sheet is divided into a plurality of sequentially longitudinally spaced printing fields having a selected field length, said printing fields each being divided into a plurality of longitudinally and laterally spaced printing domains. The plurality of imprints are divided into a plurality of subsets thereof, said subsets having a null set intersection with each other, the union of all of said subsets of said imprints being a set consisting of all said imprints, each of said subsets of said imprints being sub-divided into a different integral number of sub-subsets of said imprints. The imprints are printed on each of the printing fields on the sheet such that each of the sub-subsets of the imprints is printed on only a selected subset of the longitudinally and laterally spaced printing domains, the printing fields having a null set intersection with one another and the selected subsets of the printing domains having a null set intersection with one another.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: May 16, 1989
    Inventor: Albert J. Six
  • Patent number: 4830405
    Abstract: The method consists of nullifying on a ticket a predetermined number of squares in a first series of squares by the removal of an opaque layer coated thereon and carrying the data to be validated by uncovering, under each square, a respective symbol, and of nullifying all the squares in a second series of squares by the removal of an opaque layer coated thereon and carrying said symbols, except for those squares which carry identical symbols of those uncovered in the first series of squares. If the squares uncovered from the first series identify a date, the presence on a ticket of covered squares in the second series carrying the same symbols as appear in the uncovered squares from the first series certifies that the squares in the second series have been uncovered after uncovering the squares in the first series, thus validating the identified date.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: May 16, 1989
    Assignee: ChetJack Limited
    Inventor: Antonio Di Bella
  • Patent number: 4820912
    Abstract: A method and an apparatus for checking the authenticity of documents, such as banknotes or credit-cards. The documents comprise a number of randomly distributed conductive fibres of which the distribution is scanned by microwaves and the response is transformed into a digital coded signal. A digital mark on the document, which is representative for the distribution of an individual document, is read off, transcoded, and compared with said coded signal for producing an approval signal. The use of a microwave scanning system in conjunction with documents having a random distribution of suitable fibres ensures a great repetitivity and security of the system.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: April 11, 1989
    Assignee: N. V. Bekaert S.A.
    Inventor: Johan Samyn
  • Patent number: 4798403
    Abstract: A method of identification to determine whether a person tendering a document, such as a check or credit card, is the proper bearer of the instrument. The method involves assigning a series of letters designating various physical characteristics of the proper bearer of the instrument, such as the sex and race of the person, the color of the eyes and hair, the age, height and weight, and whether the person typically carries any of several different accessories. Letters corresponding to these various characteristics are applied to the instrument so that the person to whom it is tendered need merely compare the characteristics identified by the letters with the characteristics of the person tendering the instrument. In one modification, numerals are used to indicate age, height and weight.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: January 17, 1989
    Inventor: Frederic P. Nelson
  • Patent number: 4773677
    Abstract: There is disclosed a unitary laminated identification card and insignia comprising a lamination including a sheet element carrying photographic information, such as the likeness of the card bearer, a protective plastic sheet member therefor and a relatively thin embossed insignia member having an insignia pattern, the raised portions of the embossed insignia pattern providing an effect of optical dimensionality (depth) visually detectable through a protective plastic sheet member laminated thereto.
    Type: Grant
    Filed: May 13, 1987
    Date of Patent: September 27, 1988
    Assignee: Polaroid Corporation
    Inventor: Paul A. Plasse
  • Patent number: 4765656
    Abstract: The present invention relates to a data carrier (identification card, bank card, credit card, etc.) in which information is provided in an inner volume area by means of a laser beam, the information being visible in the form of changes in the optical properties of the carrier material due to an irreversible change in the material caused by the laser beam and to a method for producing the data carrier and for testing it.
    Type: Grant
    Filed: October 15, 1986
    Date of Patent: August 23, 1988
    Assignee: GAO Gesellschaft fur Automation und Organisation mbH
    Inventors: Wolfgang Becker, Alexander Hierweger, Hansjurgen Merkle, Erwin Lob, Joseph Lass, Wittich Kaule
  • Patent number: 4765655
    Abstract: A method for rapid identification of art objects or other valuables. Oil paintings, sculptures and other valuable objects are coded with radioisotopes at a specific X,Y,Z coordinate system. The exact location of the isotope and a measurement of the emitted radiation are recorded for future use to show the art object, or any other valuable object, has been destroyed, stolen, lost, or duplicated.
    Type: Grant
    Filed: April 22, 1986
    Date of Patent: August 23, 1988
    Inventor: Ioan G. Crihan
  • Patent number: 4763928
    Abstract: A method and apparatus for theft identification of articles, such as, machines and equipment employs one or more miniature, coded portions or disks, each disk in the form of a thin film bearing preassigned data which is photo optically reduced on the film so as not to be readable with the naked eye, and at least partially severed from the film so as to facilitate application to an article. The disks may be placed on or buried in the articles at different locations known only to the owners as well as being placed at other random locations and are composed of a material not discernible by remote locating means thereby making it virtually impossible for unauthorized persons to locate and remove the disks from the equipment.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: August 16, 1988
    Assignee: Equipment Identification Systems, Inc.
    Inventors: Rickie F. Krietemeier, Jeffrey A. Strom, Richard A. Stonich
  • Patent number: 4763927
    Abstract: In order to increase the protection against forgery of a security paper, a security inlay made of polymer material having piezoelectric and/or pyroelectric properties is embedded in the security paper. The presence of such an inlay can be tested by means of contacting and non-contacting measuring methods.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: August 16, 1988
    Assignee: GAO Gesellschaft fur Automation und Organisation mbH.
    Inventor: Walter Schneider
  • Patent number: 4740015
    Abstract: A security document having first and second areas on one side coated or treated with complementary compositions of the types that will leave a mark when pressed together, with some areas of one composition desensitized, so that the authenticity of the document may be tested by folding the document to place the areas together and then exerting pressure thereon.
    Type: Grant
    Filed: July 1, 1986
    Date of Patent: April 26, 1988
    Assignee: Moore Business Forms, Inc.
    Inventors: Richard D. Caprio, Roland L. Engle
  • Patent number: 4732411
    Abstract: A surveillance system for monitoring the dispensing of prescribed medication to insure that the proper patient is, in fact, being administered the prescribed medication and dosage, and that the patient for whom the medication is prescribed is so identified, before the medication is administered. To assure that the proper patient is receiving the prescribed medication, both a photograph and a description of the medication and dosage is imprinted on a label affixed to any means used to transport the medication to the patient. The label may also contain other vital patient information such as patient allergies and anticipated adverse reactions to the medication and other instructions for the well being of the patient.
    Type: Grant
    Filed: February 5, 1987
    Date of Patent: March 22, 1988
    Assignee: Siegel Family Revocable Trust
    Inventor: Harold B. Siegel
  • Patent number: 4730849
    Abstract: A method of maintaining a close surveillance over and the monitoring of the dispensing of prescribed medication, to insure that the proper patient is, in fact, being administered the prescribed medication and dosage, and that the patient for whom the medication is prescribed is properly identified or recognized, before medication is administered. To assure that the proper patient is receiving the prescribed medication, both a photograph and a desription of the medication and dosage is imprinted on a label affixed to a means for transporting the medication to the patient. The label may also contain other vital patient information such as patient allergies and any anticipated adverse reactions to the medication and other instructions for the well being of the patient.
    Type: Grant
    Filed: February 5, 1987
    Date of Patent: March 15, 1988
    Assignee: Seigel Family Revocable Trust
    Inventor: Harold B. Siegel
  • Patent number: 4725079
    Abstract: A method for enhancing the security of instant lottery tickets. A book number indicating from which packet a particular lottery ticket originated is printed on the back of the ticket and an integrity number is printed on the front of the ticket. The integrity number is related to the book number by an algorithm known only to the ticket manufacturer and the lottery administration. To further enhance the security of the ticket, the book number and integrity number are simultaneously printed onto the ticket.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: February 16, 1988
    Assignee: Scientific Games, Inc.
    Inventors: John R. Koza, Martin A. Keane, William F. Behm
  • Patent number: 4725078
    Abstract: Gypsum wallboard, for use in drywall construction, printed with suitable identifying indicia on the face using an optical brightener which is visible only under ultra-violet light. The wallboard is identifiable as to source, after the board is installed, and even after having been painted.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: February 16, 1988
    Assignee: National Gypsum Company
    Inventor: Edmund J. Janicki
  • Patent number: 4691940
    Abstract: The invention relates to a printed security with a hallmark in the form of a coating applied in a vacuum to the surface of the security. This coating is so thin that it is almost invisible even as a metal layer, while at the same time permitting accurate automatic examination. The absorption characteristics of the security are preferably measured in a certain range of the wavelength of the spectrum.
    Type: Grant
    Filed: January 2, 1985
    Date of Patent: September 8, 1987
    Assignee: GAO Gesellschaft fur Automation und Organisation mbH
    Inventors: Gerhard Stenzel, Wittich Kaule
  • Patent number: 4669753
    Abstract: A fingerprint, and the like, image-data records keeping system and apparatus provides for image-data review from each side of a transparent carrier base to allow an X-ray type of examination as by viewing an image-data record from the front and back. A method and apparatus for obtaining individual image-data records includes a soft, resilient working surface having low friction surface and a flexible base material coated with adhesive on one side for placement on the portion of a body of which fingerprints, or the like, are to be recorded.
    Type: Grant
    Filed: April 10, 1986
    Date of Patent: June 2, 1987
    Inventors: Larry D. Land, Gary J. Wallin
  • Patent number: 4662651
    Abstract: Apparatus and method for protecting a document against unauthorized alteration comprising providing, on localized areas of a substrate, a self-contained chemical system which can produce an authorized visible message when subjected to impact pressure, and the same chemical system produces an unauthorized warning indication when any attempt is made to mechanically alter the authorized visible message.
    Type: Grant
    Filed: May 31, 1985
    Date of Patent: May 5, 1987
    Assignee: The Standard Register Company
    Inventor: William H. Mowry, Jr.
  • Patent number: 4660859
    Abstract: A new process for marking currency to permit easy and positive authentication at a later date comprising exposing a small region of the currency to bombardment by high energy neutrons for a short period, treating the exposed small region with a chemical reagent which reacts with the treated area to form tiny holes which can later be used for authentication. Also provide is a method for authentication which comprises exposing the marked currency to monochromatic X-rays, allowing the transmitted beam to impinge upon a fluorescent screen which will show shiny dots where the beam has reached the screen, said dots corresponding to the tiny holes in the marked currency.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: April 28, 1987
    Assignee: Materials Research, Inc.
    Inventor: Ram Natesh
  • Patent number: 4650219
    Abstract: A system is described that facilitates notification of the parents of a lost child, while preventing strangers from learning the name of the child or parents. The system includes an alphanumeric identification marking (I.D. marking) on an item of clothing of a particular child, the I.D. marking being unique to the particular child but not containing the child's name. An alert marking, similar to alert markings on other children's clothing that have an I.D. marking, alerts authorities who find a lost child that an I.D. marking is present and indicates where it is located, such as hidden within a pocket. Authorities finding the child, and by the alert marking are directed to the I.D. marking, are able to contact a central station which can notify the parents of the child that the child has been found. The I.D. marking can be generated from a credit card number of a parent by a formula that permits knowledge of the I.D.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: March 17, 1987
    Inventor: Malcolm Sigman
  • Patent number: 4645239
    Abstract: A label assembly includes machine readable indicia on the underside of the backing strip for verifying correspondence between identifying indicia on the label and the contents of a container before and/or during and/or after labeling of the container and is made by feeding a label layer/backing layer laminate web along a travel path and printing machine readable indicia on the underside of the backing layer and printing identifying indicia on the label layer.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: February 24, 1987
    Assignee: Bristol-Myers Company
    Inventor: Samuel G. Adams
  • Patent number: 4634148
    Abstract: A negotiable instrument operable for automatic bank scanning and processing wherein the negotiable instrument includes three field areas to receive maker, payee, and amount indicia. A fluorescent ink is applied as background on at least one of the field areas of the negotiable instrument. When ultraviolet light is used to illuminate the negotiable instrument indicia added on top of the fluorescent ink may be automatically detected and scanned.
    Type: Grant
    Filed: November 17, 1983
    Date of Patent: January 6, 1987
    Inventor: Edwin B. Greene
  • Patent number: 4629215
    Abstract: The disclosure concerns an identification card containing information such as name, account number, photo of the card owner, etc. The card is protected by a superjacent printed security pattern, such as a guilloche, or other pattern which is difficult to imitate, or a homogeneous printed surface. The information is inscribed into the identification card material through the printed security pattern by a laser beam recorder. The energy of the laser and the colors of the printed security pattern are coordinated with each other in such a way that the laser light is not absorbed by the printed security pattern and the latter is not destroyed by the laser light.
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: December 16, 1986
    Assignee: GAO Gesellschaft fuer Automation und Organisation mbH
    Inventors: Thomas Maurer, Hans J. Holbein
  • Patent number: 4614366
    Abstract: A device and method for applying and retaining a data carrier to a living body for providing identification of the body with respect to a reference group wherein the body's external nail surface structure, the method comprising selecting a carrier suitable for attachment to the nail surface, modifying the carrier to include a unique data format and attaching the carrier at the nail surface. The data carrier comprises a thin, substantially flat carrier suitable for attachment to the nail surface and a unique data format applied to the carrier adapting the same for repeated detection. The device and method are adaptable for use within identification systems such as hospital patient identification, clinical testing and security access control environments.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: September 30, 1986
    Assignee: EXACTident, Inc.
    Inventors: Vaughn W. North, Richard W. Elggren
  • Patent number: 4609207
    Abstract: A method of testing a security having a mechanically testable identifying mark, for example a security thread, which has a physical property, for example electric conductivity, which can be measured without contact by means of a first field, for example, an electric field. The physical property can be reproducibly influenced by the effect of a second field, for example an electromagnetic field. If this influence takes place periodically, a signal is produced as a measured variable modulated according to the mutual effect of the two fields.
    Type: Grant
    Filed: January 9, 1985
    Date of Patent: September 2, 1986
    Assignee: GAO Gesellschaft fur Automation und Organisation mbH
    Inventors: Hajo Muck, Wolfgang Becker
  • Patent number: 4588211
    Abstract: A machine readable document is disclosed with unknown variable data of a specified nature imprinted thereon in unknown, variable locations. The data is imprinted on the document in such a manner that it can be machine located, accurately read, and identified as to type for further use in creating a composite record. In one embodiment, the document is a negotiable instrument or bank check which can be machine read and used in the production of a composite image statement.
    Type: Grant
    Filed: April 9, 1984
    Date of Patent: May 13, 1986
    Inventor: Edwin B. Greene
  • Patent number: 4582345
    Abstract: A method of indicating the face value of a commercial document such as a bank draft or a check while simultaneously precluding subsequent alteration thereof.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: April 15, 1986
    Inventor: Terrence F. Kehoe
  • Patent number: 4579371
    Abstract: A standardized document such as a credit card or drivers license contains an electrically conductive authenticating layer which is not visually discernible and has an electrical resistivity of less than 50 megohms per square. The presence of the authenticating layer may be verified by a proximity switch that can be built into mechanisms normally used in processing the document.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: April 1, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William H. Long, Richard M. Fischer, Jr.
  • Patent number: 4576399
    Abstract: A three panel format and method useful to (a) office, (b) clinical research and (c) statistical personnel in connection with the preparation, identification and statistical evaluation of controlled, blinded code designated samples are provided. The format comprises a write-on panel (A) for mounting code designations, and test substance identities arranged so that the code designations will be transferred through panel (A), and a second, removable panel (B) having rows of writing transference substance thereon to a third panel (C), without transferring the test substance to said panel (C), when panel (A) is folded into an in-line writing relationship with said panels (B) and (C). Thereafter, panels (A) and (C) are folded 360.degree. and sealed in an in-line relationship for use thereafter by clinical and statistical personnel.
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: March 18, 1986
    Assignee: The Upjohn Company
    Inventors: Cathleen A. White, Richard K. Senne, Harry Rutherford
  • Patent number: 4519631
    Abstract: One section of a two piece label is marked by the supplier (wholesaler) with general product information and a separable section of the same label is marked with certain pricing information for the consumer and the label is then attached to the product's shipping container in a fashion such that the general product information remains permanently attached to the container and the consumer pricing information section can be removed and placed on the store shelf when the product is removed from the container and placed on the shelf.
    Type: Grant
    Filed: January 6, 1983
    Date of Patent: May 28, 1985
    Inventors: Joel R. Stone, Gary H. Stone
  • Patent number: 4512595
    Abstract: A tamper-resisting negotiable instrument, its method of manufacture and use are disclosed. The instrument includes a stack of webs comprising a substantially transparent first web having one surface adapted to receive images; a second, removable web, having an image transferring means the one surface in contact with the one, image receiving surface of the first web; and a third removable web including an area capable of visualizing images on its surface facing the second web. Inscription of an image against the surface of the top web in the stack transfers the image from the image transferring means of the second web to the surface of the first web adapted for receiving images and also to the image visualizing area of the third web. Removal of the second web thereafter permits visual inspection of the transferred images, which are superimposed if there has been no tampering.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: April 23, 1985
    Assignee: Rand McNally & Company
    Inventor: Thomas J. Breen
  • Patent number: 4506914
    Abstract: Security for a package or verifying seal in plastic material is provided by a print seal with unique thermally produced imprints in the plastic. If tampering is attempted, the material is irreparably damaged and thus detectable. The pattern of the imprints, similar to "fingerprints" are recorded as a positive identification for the seal, and corresponding recordings made to allow comparison. The integrity of the seal is proved by the comparison of imprint identification records made by laser beam projection.
    Type: Grant
    Filed: November 17, 1981
    Date of Patent: March 26, 1985
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Garth W. Gobeli
  • Patent number: 4492487
    Abstract: Coded data imprinted in close spaced relation on data sheets retained within a loose leaf binder is selectively marked through cutout openings in a transparent overlay mask. The mask is positioned in proper alignment over each of the data sheets by means of aligning slots through which at least two of the binder rings project.
    Type: Grant
    Filed: April 1, 1982
    Date of Patent: January 8, 1985
    Inventor: Woodrow Spear
  • Patent number: 4438950
    Abstract: There is disclosed a composite label web having pressure sensitive labels especially adapted for re-pricing. The composite label web is of a type in which pressure sensitive adhesive is on the underside of the label and the outer side of the label is free of adhesive and can be printed with re-price data. The label can, however, be applied with a hand-held labeler to the underside of a tag and thereafter the label is manually folded so that the printed re-price data appears on the same side as printed price data at the outer side of the tag. Also disclosed is the resultant tag and re-price label combination, and method of price and re-price marking using such labels.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: March 27, 1984
    Assignee: Monarch Marking Systems, Inc.
    Inventor: Paul H. Hamisch, Jr.
  • Patent number: 4408782
    Abstract: Graphic means in the form of one or more symbols applied to one or more of the panels of a plurality of cargo containers to be loaded in a cargo receiving space, such as the cargo receiving space of a vehicle. The symbols provide graphic instructions to a loader as to how the cargo containers should be oriented in the cargo space of a vehicle in order to obtain a loading pattern which substantially maximizes the number of cartons that can be loaded in the cargo receiving space. The loading pattern obtained from the graphic instructions provided by the symbols also serves to reduce the clearance between the cartons and the walls of the cargo receiving space and hence the possibility of damage to cargo in the containers or cartons due to shifting while in transit.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: October 11, 1983
    Assignee: Merriam, Marshall & Bicknell
    Inventor: Edward L. Condon
  • Patent number: 4389472
    Abstract: The process relates to the production of tamperproof documents by laminating an information carrier on one or both sides with foils which have an adhesive layer which is hardened by radical cross-linking.
    Type: Grant
    Filed: December 16, 1980
    Date of Patent: June 21, 1983
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Karl-Friedrich Neuhaus, Hans J. Rosenkranz, Hermann Perrey
  • Patent number: 4381329
    Abstract: A thermoplastic protective film for use in the manufacture of forgery-resistant identification documents, comprising a base layer and a cover layer comprising a partially hydrolyzed olefin/vinyl ester copolymer. The cover-layer side of the film is laminated under the action of heat to the identification document.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: April 26, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hermann Dallmann, Hans J. Palmen