EP0830488B1 - Vorrichtung zum fertigstellen von ecken von zwischenwänden - Google Patents

Vorrichtung zum fertigstellen von ecken von zwischenwänden Download PDF

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Publication number
EP0830488B1
EP0830488B1 EP95923025A EP95923025A EP0830488B1 EP 0830488 B1 EP0830488 B1 EP 0830488B1 EP 95923025 A EP95923025 A EP 95923025A EP 95923025 A EP95923025 A EP 95923025A EP 0830488 B1 EP0830488 B1 EP 0830488B1
Authority
EP
European Patent Office
Prior art keywords
finishing device
drywall
corner
connecting portion
front surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95923025A
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English (en)
French (fr)
Other versions
EP0830488A1 (de
EP0830488A4 (de
Inventor
Paul E. Stibolt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JUDY, RUSSEL E.
OMNIFLX PROFILES, INC.
Original Assignee
Judy Russel E
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Judy Russel E filed Critical Judy Russel E
Priority claimed from PCT/US1995/007387 external-priority patent/WO1996041927A1/en
Publication of EP0830488A1 publication Critical patent/EP0830488A1/de
Publication of EP0830488A4 publication Critical patent/EP0830488A4/de
Application granted granted Critical
Publication of EP0830488B1 publication Critical patent/EP0830488B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • drywall tape and metal corner beads Conventional drywall tape is provided in narrow, elongated ribbons or strips of porous paper wound into rolls. The paper is sometimes perforated to increase moisture penetration and to prevent air bubbles from being entrapped behind the tape.
  • the drywall tape is first applied to joints and edges of abutting drywall panels and is then covered with wet plaster, sometimes called "mud.”
  • the plaster is feathered and smoothed along the edges of the tape to conceal the demarcations between the tape edges and the drywall panels to which the tape is applied.
  • wet plaster has dried, the tape and drywall can be painted or otherwise covered with a suitable wall covering.
  • Coffered and vaulted ceilings have recently become very popular among homebuilders and buyers. Often the peak of such ceilings will form an acute angle. It is difficult to fit a conventional plaster trowel into such angles.
  • drywall tape is formed of paper, it is quite flexible and will conform to various surface configurations of the edges of intersecting panels of drywall.
  • conventional drywall tape is used at the outside corners of walls, the flexibility of the tape often results in a corner demarcation that is irregular, since the tape conforms to irregularities in the exposed, severed edges of the drywall panels.
  • the tape is also fragile and does not stand up well to the constant physical abuse suffered by outside corners. As a consequence, conventional drywall tape cannot be used at exposed outside corners.
  • metal corner beads are often used.
  • Conventional metal beads are configured in an L-shaped or angle-shaped cross section and are typically fabricated from elongated perforated strips of metal, such as galvanized steel, permanently deformed with a lengthwise 90-degree bend to form elongated angles.
  • the metal beading is typically positioned at the intersections of adjacent drywall panels that meet at right angles to form an outside corner within a room.
  • the sections of metal beading are nailed in place through the drywall panels to wooden supporting structural members located behind the drywall panels.
  • Wet plaster is then smoothed into place to cover the metal flanges or leg members of the metal beading, and the edges of the plaster are smoothed and feathered to attempt to conceal the metal edges.
  • the rigidity of the metal beading does allow an outside corner of an inside building wall to be finished with a sharp, straight edge, which is aesthetically pleasing
  • the use of metal beading involves some significant problems. Over time, the metal corner bead will rust, thereby producing rust stains that are clearly visible on the surfaces of the walls at the corner. It is not always possible to completely cover the edges of the metal flanges or the nail heads used to attach the metal corner bead to the drywall panel, detracting from the desired smooth appearance of the wall. Cracks often develop in the overlying plaster at the outer edges of the flanges.
  • the strips Because of the rough handling to which most of the material at a work site is subjected, it is not uncommon for the strips to be wrinkled, dented, and perhaps twisted, thus rendering them either unusable, or usable only to produce an inferior end result. In addition, the metal strips are used in large quantities in construction and can add up to considerable cost.
  • Swanson and Lamb describe plastic joint strips that can be reversibly bent to be adhesively secured to both inside and outside corners.
  • Baker shows an outside corner connector for waterbed pedestals in which the panels forming the pedestal are inserted into the connector.
  • Ellingson provides a double-layer wall member guard structure for outside corners made of a resilient material.
  • Schaafsma describes two types of wallboard corners, one for inside corners that is held in place by putty and another for outside corners that is held in place by the drywall panels themselves.
  • the former is disadvantaged by the fact that it is held on only by putty; if the putty does not adhere well to the drywall, the corner will become loose.
  • the outside corner must be placed under the drywall panels, involving considerable bending or, if placed on the corner before the panels, a certain amount of extra effort to hold the corner in place while the panels are being nailed over it.
  • Both corners use tape to provide a smooth top finish that can be blended in with the drywall finish by applying plaster and sanding.
  • Weinar provides a plastic or metal T-shaped corner construction in which the post of the T sits between two abutting pieces of drywall and the cross bar lies atop the drywall panels. Part of the paper covering from one panel is wrapped around the cross bar to provide a finished appearance, leaving a ridge down one side of the corner. This corner construction can only be used on outside corners.
  • Schneller describes yet another type of metal outside corner bead in which an additional flange extends over the edge of the drywall board forming the outside corner. Ridges are left on both sides of the corner, and this corner bead can only be used on outside corners.
  • Bernard presents a plastic L-shaped outside corner cover that uses heat-shrinkable plastic tape along the arms both as a method of attachment and as a method of providing a smooth junction between the cover and the drywall.
  • This cover can be used for outside corners having a variety of angles.
  • Tucker provides a paper drywall ribbon having a centrally located plastic bead extending longitudinally along the ribbon. Plaster is used to attach the ribbon to the drywall. This plastic bead is designed to be used with outside corners only.
  • Conboy describes a plastic drywall tape that can be used on both inside and outside corners. Again, this plastic tape is held on the corner with plaster, and plaster is used to provide a finished appearance.
  • Tucker describes a stiff plastic strip with a curved center section and two flanges that is attached to outside or inside corners with adhesive. The flanges are then covered with paper tape strips and plaster.
  • Weldy provides a wall edging system for both inside and outside corners that comprises a plastic strip having an arcuate center portion to which are attached two flanges at right angles.
  • the strip is attached to the drywall with nails. Plaster is then smoothed over the strip to finish the edges. The side of the strip facing out toward the room can be finished with primer.
  • Ritchie et al. describe a corner bead for outside corners that has a metal core and that is completely covered by paper. This bead has a rounded nose and side flanges. The paper covering is further coated with a reinforcing emulsion. The corner bead is nailed to the drywall, and plaster is used to hide the edges.
  • the reference FR-A-2 700 568 discloses a device for coupling two panels together having two sections for receiving the panels and a flexible band connecting the two sections.
  • the device may be bent at the flexible band to form a rounded or "bullnosed" corner.
  • DE 28 04 173 A discloses a panel receiving device having two wings connected by a flexible joint, each wing may have a front and rear surface, said front and rear surfaces being free from any reinforcing structure therebetween.
  • a finishing device is also needed that will simplify installation of drywall in acutely angled inside corners and minimize the need to use plaster. None of the above-described drywall corners fulfills these needs.
  • the present invention provides a finishing device according to claim 1.
  • a finishing device used to form a corner between two panels of drywall has a flexible joint extending along a predetermined axis.
  • Two wings are connected to and extend outwardly in a diverging relation from the flexible joint to form a corner having an adjustable angle.
  • Each wing has a front surface, a rear surface, and an edge distal from the flexible joint. This edge abuts one of the drywall panels and has a thickness approximately equal to the thickness of the drywall panel.
  • a layer of primer or adhesive laminate is applied to the front surface of the wings so that paint or wallpaper or other wallcoverings can bond to the front surface.
  • the finishing device is capable of forming both inside and outside corners. To form inside corners, the finishing device bends along the flexible joint. To form outside corners, strips parallel to the flexible joint are removed from the rear surface of the wings and the finishing device is folded along the openings thus created.
  • the left 102 and right 104 wings of the drywall corner finishing strip are attached to a flexible center joint 100 and extend outwardly therefrom to a distal edge 110.
  • the wings 102, 104 have a front surface 106 and a rear surface 108.
  • the front surface 106 and rear surface 108 extend outwardly beyond the distal edge 110 of the wings 102, 104 to cover the distal edge 110.
  • the rear surface 108 of the device is juxtaposed to the framing of an interior wall while the front surface 106 faces out into the room, contiguous with the surface of the drywall panels forming the wall.
  • the front surface 106 may be covered with a layer of primer 300 as shown in FIG. 3 so that any paint or wallcovering that is eventually used to decorate the wall will adhere easily.
  • the front surface 106 may have an adhesive laminate 400 attached to it as shown in FIG. 4.
  • the structure of the drywall corner finishing device is more clearly seen in FIG. 2.
  • the flexible center joint 100 is preferably arcuate, but it is to be expressly understood that any joint shape, such as V-shaped, U-shaped, C-shaped, etc., can be used that allows the device to bend through a variety of angles at the center joint 100.
  • the center joint 100 extends along an axis that extends linearly to form a corner or edge.
  • a number of struts 206 separate the rear surface 108 of each wing 102, 104 from the front surface 106 of each wing 102, 104.
  • the pattern of struts 206 provides stability to the structure of the corner device and also allows the device to be folded around outside corners, as discussed in more detail below. It will be obvious to one skilled in the art that the pattern of struts 206 shown in FIGs. 1 and 2 is not the only pattern that will provide these features of stability and folding and that other patterns would be suitable and are to be included in the present invention.
  • the edge 202 of the rear surface 108 extends beyond the edge 200 of the front surface 106.
  • the distal portion 204 of the front surface 106 tapers slightly toward the rear surface 108 so that, as discussed in more detail below, the edge of a drywall panel can be placed in the space 114 between the front surface 106 and the rear surface 108 such that the edge 202 of the rear surface 108 and the edge 200 of the front surface 106 are in close apposition to the drywall panel.
  • the rear surface 108 contains a number of removable strips 208, 210 that are removed when it is desired to fold the drywall corner finishing device around outside corners, as discussed in more detail below.
  • FIG. 8 illustrates the inside corner formed when a vertical wall meets a coffered or cathedral ceiling.
  • FIG. 9 shows the inside corner formed at the vault of such a ceiling. Depending on the design of the building, these corners may have angles ranging from less than 90 degrees to 180 degrees.
  • the drywall corner finishing device is used to finish an inside corner, the rear surface 108 is first placed directly against the framing.
  • the center joint 100 flexes from 180 degrees, shown in FIG. 6, to the appropriate angle needed to fit the angle made by the corner, as shown by arrow 500 in FIG. 5 and arrow 700 in FIG. 7.
  • the finishing device is attached to the wall framing 800 and ceiling rafter 802 by use of nails 806.
  • the finishing device is made of plastic soft enough to permit the nails 806 to be driven through the flange 112 of the rear surface 108 without the need for pre-formed holes. It is to be expressly understood that other methods such as the use of screws, bolts, adhesive, etc., will be equally efficacious in attaching the finishing device to the supporting members of the wall or ceiling.
  • the attachment location of the device and the positions of the nails 806 can be varied to enable the device to correct inequalities that may exist within the framing and from one framing member 800 to the next. If necessary, shims may be placed behind the device before it is attached by nails 806.
  • the edges of the drywall panels 804 are inserted into the spaces 114 between the front surface 106 and rear surface 108, such that the edges of the drywall panels 804 abut the distal edges 110 of the wings 102, 104. It can be seen in FIG. 8 that the spaces 114 between front surface 106 and rear surface 108 are just large enough to accommodate the drywall panels 804 and that the front surface 106 and rear surface 108 are closely juxtaposed to the drywall panels 804. The drywall panels 804 thus hide the nails 806. The drywall panels 804 are attached to the framing 800 and rafter 802 in the usual fashion.
  • plaster 1300 is then applied to the tapered distal portion 204 of the front surface 106 and the tapered edge of the drywall panel 804 to hide the edge 200 and provide a smooth, level surface. Because plaster 1300 is applied only to the tapered portion 204 of the finishing device, difficulties inherent in plastering within corners are avoided. Such difficulties include, among others, the difficulty in maneuvering a plaster trowel within a corner, the skill needed to produce a perfectly straight edge where the two sides of the corner meet, and the need for several layers of plaster 1300 to completely hide the joint between the finishing device and the drywall or to correct the inequalities resulting from mis-sized, mis-placed, or warped framing members, with each layer requiring considerable time to dry.
  • the surface of the wall can be finished by painting, wallpapering, or any other method desired.
  • the primer 300 bonded to the front surface 106 enables paint or other wallcoverings to adhere to the front surface 106 of the finishing device.
  • a laminate 400 can be adhesively affixed to the front surface 106 to provide a surface for subsequent painting.
  • FIG. 9 A second example of the use of the finishing device for inside corners is shown in FIG. 9.
  • the finishing device provides an inside corner essentially as described above, except here the corner is that formed by the vault of a coffered ceiling.
  • the device is attached to the rafters 900 by driving nails 904 through the flanges 112.
  • the attachment location of the device and the positions of the nails 904 can be varied to enable the device to correct inequalities that may exist within the rafters 900 and from one rafter 900 to the next.
  • shims may be placed behind the device before it is attached by nails 904.
  • the edges of the drywall panels 902 are then inserted into the spaces 114 between the front surface 106 and rear surface 108.
  • these spaces 114 are just large enough to accommodate the edges of the drywall panels 902, so that the front surface 106 and rear surface 108 are in close apposition to the drywall panels 902.
  • the drywall panels 902 thus hide the nails 904.
  • the drywall panels 902 are attached to the rafters 900 in the usual fashion. Plaster 1300 is then applied to the tapered distal portion 204 of the front surface 106 and the edge of drywall panels 902 to provide an even surface. Because of the primer 300 or laminate 400 covering the front surface 106, it is not necessary to use plaster on the remainder of the front surface 106, and the difficulties of plastering within the tight angles formed by inner corners are avoided.
  • the surface of the wall is then painted or otherwise finished as desired.
  • FIGs. 10 and 11 Two examples of such outside corners are shown in FIGs. 10 and 11.
  • Figure 10 illustrates outside corners formed by 2-by-4 framing boards 1000, 1002, and
  • FIG. 11 shows outside corners formed by 2-by-6 framing boards 1100, 1102.
  • the rear surface 108 contains at least two sets of removable strips 208, 210. It is to be expressly understood that the removable strips 208, 210 can be located in any convenient place on the rear surface 108 and that the present invention is not limited to the locations of the strips 208, 210 shown. Strips 208 are removed when 2-by-4 boards 1000, 1002 are used, and strips 210 are removed when 2-by-6 boards 1100, 1102 are used. Once the strips 208 or 210 are removed, the front surface 106 can be bent around both outside corners. This process is described below and shown in FIGs. 12(a) - 12(c).
  • a removable strip 208 is held by a number of thin tags 1200 between the struts 206 parallel to the rear surface 108. To remove a strip 208, one need only break the thin tags 1200. The strip 208 is then removed in the direction of the arrow 1202 and discarded. The front surface 106 is then bent in the direction of the arrow 1204 to form a corner that will fit around one of the adjacent outside corners. It is to be understood that a similar but mirror-image process occurs with the second strip 208, so that the front surface 106 can be bent to form a second corner that will fit around the second of the juxtaposed outside corners. The strips 210 are removed in the same manner to permit the finishing device to be bent around two outside corners that are further apart.
  • the finishing device is attached to the framing board 1000 or 1102 by use of nails 1004 or 1104.
  • the attachment location of the device and the positions of the nails 1004, 1104 can be varied to enable the device to correct inaccuracies that may result from warped or mis-sized framing boards 1000, 1002, 1100, 1102 or inconsistencies in building practices. If necessary, shims may be placed behind the device before it is attached by nails 1004, 1104.
  • the drywall panels 1006, 1106 are inserted as described above for inside corners, and the joint between the finishing device and the drywall panels 1006, 1106 is finished in the same manner as described above and shown in FIG. 13 for inside corners.
  • FIG. 14 shows a cross-sectional view of an alternative embodiment of the present invention.
  • This embodiment provides only one set of removable strips 210 located equidistant from the center joint 100.
  • the number and complexity of the struts 206 has also been reduced to simplify manufacture of the device by plastic extrusion.
  • the arrangement of the distal struts 207 has also been changed for greater support to the tapered end 204 of the front surface of the device. If a portion of the rear flange 112 is drawn rearward to accommodate an uneven section in a rafter, the distal strut 207 will tend to allow the tapered front surface 204 of the device to maintain a straight edge in spite of irregularities in the underlying rafters. Assuming the device is molded from some type of flexible plastic, the end strut 205 will deform as necessary to accommodate such irregularies.

Landscapes

  • Finishing Walls (AREA)

Claims (12)

  1. Fertigstellvorrichtung zur Verwendung beim Bilden einer inneren oder äußeren Ecke zwischen zwei Trockenbaupaneelen, die Kanten mit einer vorbestimmten Dicke besitzen, wobei die Fertigstellvorrichtung aufweist:
    zwei Flügel und einen flexiblen Verbindungsabschnitt, der die zwei Flügel verbindet, wobei die zwei Flügel (102, 104) sich nach außen in einer auseinanderstrebenden Beziehung von dem Verbindungsabschnitt (100) erstrecken, um eine Ecke mit einem einstellbaren Winkel zu bilden, wobei jeder Flügel eine Frontpaneelfläche (106) und eine Kante (110) distal von dem Verbindungsabschnitt (100) zum Anliegen an einem der Trockenbaupaneele besitzt, wobei die distale Kante (110) eine Dicke annähernd gleich der Trockenbaupaneelkantendicke besitzt, wobei die zwei Flügel und der Verbindungsabschnitt eine einstückige Struktur bilden und der Verbindungsabschnitt ein sich linear erstreckendes Gelenk (100) aufweist, das in der Lage ist, eine gerade Ecke zu bilden, dadurch gekennzeichnet, dass die Vorrichtung ein extrudierter Abschnitt ist, bei welchem die Flügel die Fronpaneelfläche (106) und eine Rückpaneelfläche (108), die beabstandet in im wesentlichen parallele Beziehung ist, und wobei sich in jedem Flügel eine Mehrzahl beabstandeter Streben (260) zwischen den parallelen, vorderen und hinteren Paneelflächen erstreckt, und zwar an Stellen, die über die jeweiligen Bereiche der Front- und Rückpaneelflächen verteilt sind.
  2. Fertigstellvorrichtung nach Anspruch 1, ferner gekennzeichnet durch eine Schicht, die auf die Frontfläche des Flügels (106) aufgebracht ist und ermöglicht, dass Farbe an der Frontfläche haftet.
  3. Fertigstellvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Schicht eine Grundierung (300) aufweist.
  4. Fertigstellvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Schicht ein Haftlaminat (400) aufweist.
  5. Fertigstellvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das flexible Gelenk (100) einen im wesentlichen bogenförmigen Querschnitt besitzt.
  6. Fertigstellvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Frontfläche (106) sich nach außen über die distale Kante (110) erstreckt, um die Trockenbaupaneelkante abzudecken.
  7. Fertigstellvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Rückfläche (108) sich nach außen über die distale Kante (110) erstreckt, um einen Flansch (112) zum Anbringen der Fertigstellvorrichtung an einem Rahmen vorzusehen.
  8. Fertigstellvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Rückfläche (108) ferner einen Streifen (208) aufweist, der sich im wesentlichen parallel zu dem Verbindungsabschnitt (100) erstreckt, der beseitigt werden kann, um zu ermöglichen, dass ein entsprechender Abschnitt der Frontfläche (106) gebogen wird, um eine zweite Ecke in einem vorbestimmten Abstand von dem Verbindungsabschnitt zu bilden.
  9. Fertigstellvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Rückfläche (108) ferner mindestens zwei Streifen (208, 210) aufweist, die im wesentlichen parallel zu und in einem vorbestimmten Abstand von dem Verbindungsabschnitt (100) sind und die entnommen werden können, um zu ermöglichen, dass die Frontfläche (106) um mindestens zwei äußere Ecken in einem vorbestimmten Abstand von dem Verbindungsabschnitt gefaltet werden kann.
  10. Fertigstellvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Vorrichtung aus Kunststoff hergestellt ist.
  11. Fertigstellvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Frontfläche (106) sich zu der Rückfläche (108) hin verjüngt.
  12. Fertigstellvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Vorrichtung in eine Mehrzahl von Winkeln an dem Verbindungsabschnitt (100) derart gefaltet werden kann, um in Ecken mit einer Mehrzahl von Winkeln zu passen.
EP95923025A 1995-06-09 1995-06-09 Vorrichtung zum fertigstellen von ecken von zwischenwänden Expired - Lifetime EP0830488B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1995/007387 WO1996041927A1 (en) 1994-04-28 1995-06-09 Drywall corner finishing device

Publications (3)

Publication Number Publication Date
EP0830488A1 EP0830488A1 (de) 1998-03-25
EP0830488A4 EP0830488A4 (de) 1998-12-23
EP0830488B1 true EP0830488B1 (de) 2007-03-21

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EP95923025A Expired - Lifetime EP0830488B1 (de) 1995-06-09 1995-06-09 Vorrichtung zum fertigstellen von ecken von zwischenwänden

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EP (1) EP0830488B1 (de)
AT (1) ATE357569T1 (de)
AU (1) AU698408B2 (de)
CA (1) CA2277827C (de)
DE (1) DE69535430T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102704634A (zh) * 2012-05-21 2012-10-03 张立功 一种天花板及其施工方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6486391B2 (ja) 2014-05-28 2019-03-20 ザ・ボーイング・カンパニーＴｈｅ Ｂｏｅｉｎｇ Ｃｏｍｐａｎｙ サンドイッチパネルの接合部、及びサンドイッチパネルを接合するための方法

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Publication number Priority date Publication date Assignee Title
IE30935L (en) * 1967-03-16 1968-09-16 Henry Cannon Buildings.
US3964220A (en) * 1970-04-15 1976-06-22 National Gypsum Company Control joint with tear strip
DE2804173A1 (de) * 1978-02-01 1979-08-09 Gul Chandiramani Profilleiste und wandflaechenelement fuer in fertigbauweise zu erstellende gebaeude o.dgl.
FR2659372A1 (fr) * 1990-03-12 1991-09-13 Letay Gerard Baguette encastrable.
FR2700568B1 (fr) * 1993-01-18 1995-04-07 Grosfillex Sarl Dispositif pour la finition du montage de panneaux divers, notamment de panneaux de revêtement de murs et de plafond.
NL9301892A (nl) * 1993-11-03 1995-06-01 Johannes Adrianus Cornelis Van Wandisolatie en een kunststof profielsysteem daarvoor.

Non-Patent Citations (1)

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Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102704634A (zh) * 2012-05-21 2012-10-03 张立功 一种天花板及其施工方法

Also Published As

Publication number Publication date
EP0830488A1 (de) 1998-03-25
AU2770995A (en) 1997-01-09
DE69535430T2 (de) 2007-11-29
CA2277827A1 (en) 1996-12-27
EP0830488A4 (de) 1998-12-23
CA2277827C (en) 2008-08-19
DE69535430D1 (de) 2007-05-03
ATE357569T1 (de) 2007-04-15
AU698408B2 (en) 1998-10-29

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