US3823564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for transporting and launching an offshore tower
Assignee: Brown and Root Inc
•
Filing: 1973-02-27
•
Granted: 1974-07-16
•
Expires: 1993-02-27
Abstract
Abstract A method and apparatus for transporting and launching an offshore tower. The apparatus according to the invention comprises a watertight buoyancy means for supporting an offshore tower in a generally horizontal transporting posture substantially above the surface of the body of water and subsequently controllably righting the offshore tower onto the bed of the body of water at a preselected marine site. The buoyancy means is connected along the lateral extent of the offshore tower by a plurality of spaced connecting assemblies. The watertight buoyancy means is interiorly compartmented with bulkheads to facilitate buoyancy control and righting of the offshore tower within the body of water. The lowermost connecting assembly between the offshore tower and the buoyancy means consists of at least one pivotal assembly so that the buoyancy means may be controllably pivoted away from the offshore tower following a righting operation. One specific embodiment of the transport and launch apparatus includes first and second tubular, selectively variable, buoyancy members. Each buoyancy member includes a unitary tubular section and a bifurated tubular section connected to one end thereof. Clamping assemblies are provided along the lateral extent of the first and second tubular buoyancy members for releasably connecting the buoyancy members to the lateral face of an offshore tower. The bifurcated tubular sections may each be provided with transversely extending bridges for supporting pivotal connection assemblies for pivotally connecting a base portion of the transport and launch apparatus to a base portion of the offshore tower. The method of transporting and launching an offshore tower according to the invention comprises the steps of floating an offshore tower to a preselected marine site upon a tubular buoyancy means, controllably righting the offshore tower within a body of water, lowering the offshore tower onto the water bed and releasing the tubular buoyancy means from a lateral surface of the offshore tower by pivoting the buoyancy means away from the offshore tower about a pivotal connection at the base of the offshore tower. The tubular buoyancy means is then refloated and transported back to an offshore tower fabrication yard for subsequent reuse.
Inventors
- 👤 J Crout
- 👤 A Koehler
- 👤 L Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:29
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/0013; B; B63; B63B; B63B35/00; B63B35/003; E02B17/02; E02B17/027; B63B35/28; B63B35/30; B63B35/301; E02B2017/0039; E02B2017/0047
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
268 words
An apparatus for transporting an offshore tower, of the type having inwardly and upwardly sloping legs, generally upon the surface of a body of water, controllably righting the offshore tower onto the bed of the body of water at a preselected marine site and controllably releasing the offshore tower at the preselected marine site comprising: watertight buoyancy means for supporting the offshore tower in a generally horizontal posture substantially above the surface of the body of water; connecting means extending between said watertight buoyancy means at spaced intervals along the lateral extent of the offshore tower for connecting said watertight buoyancy means to a lateral surface of the offshore tower; a plurality of bulkheads positioned within the interior of said watertight buoyancy means for dividing said buoyancy means into discrete compartments for facilitating the regulation of buoyancy within said watertight buoyancy means and the righting of the offshore tower onto the bed of the body of water; and said connecting means extending between said watertight buoyancy means and the offshore tower, at a base portion thereof, comprises, at least one pivotal connection assembly having a pivotal axis extending transverse to a central longitudinal axis of the offshore tower so that the means extending between said watertight buoyancy means and the offshore tower may be released with the exception of said at least one pivotal connection assembly and the watertight buoyancy means may pivot away from the inwardly and upwardly sloping legs of the righted offshore tower about the said at least one pivotal connection assembly before the watertight buoyancy member is completely released from the righted offshore tower.
Claim 2
Independent Claim
268 words
An apparatus for transporting an offshore tower, of the type having inwardly and upwardly sloping legs, generally upon the surface of a body of water, controllably righting the offshore tower onto the bed of the body of water at a preselected marine site and controllably releasing the offshore tower at the preselected marine site comprising: watertight buoyancy means for supporting the offshore tower in a generally horizontal posture substantially above the surface of the body of water; connecting means extending between said watertight buoyancy means at spaced intervals along the lateral extent of the offshore tower for connecting said watertight buoyancy means to a lateral surface of the offshore tower; a plurality of bulkheads positioned within the interior of said watertight buoyancy means for dividing said buoyancy means into discrete compartments for facilitating the regulation of buoyancy within said watertight buoyancy means and the righting of the offshore tower onto the bed of the body of water; and said connecting means extending between said watertight buoyancy means and the offshore tower, at a base portion thereof, comprises, at least one pivotal connection assembly having a pivotal axis extending transverse to a central longitudinal axis of the offshore tower so that the means extending between said watertight buoyancy means and the offshore tower may be released with the exception of said at least one pivotal connection assembly and the watertight buoyancy means may pivot away from the inwardly and upwardly sloping legs of the righted offshore tower about the said at least one pivotal connection assembly before the watertight buoyancy member is completely released from the righted offshore tower.
Claim 3
Dependent Claim
178 words
An offshore tower transport and launch apparatus comprising: a first tubular buoyancy member including, a unitary tubular section, and a bifurcated tubular section connected to said unitary section at one end thereof; means for releasably connecting said first tubular buoyancy member to at least one leg of an offshore tower; a second tubular buoyancy member including, a unitary tubular section, and a bifurcated tubular section connected to said unitary section at one end thereof; means for releasably connecting said second tubular buoyancy member to at least another leg of the offshore tower; means transversely interconnecting said first and second tubular buoyancy members at spaced intervals along tHe length of said first and second tubular buoyancy sections; and means connected to said first and second tubular buoyancy members for operably controlling the buoyancy thereof, whereby an offshore tower may be transported to a marine site in a generally horizontal posture substantially above the surface of a body of water and launched at the preselected marine site into a generally vertical posture onto the bed of the body of water.
Claim 4
Dependent Claim
178 words
An offshore tower transport and launch apparatus comprising: a first tubular buoyancy member including, a unitary tubular section, and a bifurcated tubular section connected to said unitary section at one end thereof; means for releasably connecting said first tubular buoyancy member to at least one leg of an offshore tower; a second tubular buoyancy member including, a unitary tubular section, and a bifurcated tubular section connected to said unitary section at one end thereof; means for releasably connecting said second tubular buoyancy member to at least another leg of the offshore tower; means transversely interconnecting said first and second tubular buoyancy members at spaced intervals along tHe length of said first and second tubular buoyancy sections; and means connected to said first and second tubular buoyancy members for operably controlling the buoyancy thereof, whereby an offshore tower may be transported to a marine site in a generally horizontal posture substantially above the surface of a body of water and launched at the preselected marine site into a generally vertical posture onto the bed of the body of water.
Claim 5
Dependent Claim
50 words
An offshore tower transport and launch apparatus as defined in claim 2 wherein said transversely interconnecting means comprise: spanning between said first and second tubular buoyancy members at selected locations along the length thereof; and means connected to each of said transverse tubular buoyancy members for controlling the buoyancy thereof.
Claim 6
Dependent Claim
49 words
An offshore tower transport and launch apparatus as defined in claim 2 wherein: said means transversely interconnecting said first and second tubular buoyancy members at intervals along the lengths thereof are fashioned having progressively increasing longitudinal lengths whereby said first and second tubular buoyancy members are mutually inwardly inclined.
Claim 7
Dependent Claim
31 words
An offshore tower transport and launch apparatus as defined in claim 2 wherein: each of said unitary tubular sections, at the free ends thereof, are provided with cone shaped nose sections.
Claim 8
Dependent Claim
71 words
An offshore tower transport and launch apparatus as defined in claim 2 wherein the bifurcated tubular portions of said first and second tubular buoyancy members each comprise: generally parallel spaced tubular buoyancy members joined at one of the ends thereof by a generally transverse member which in turn is joined in approximately a mid portion thereof to one end of the unitary tubular section of one of the tubular buoyancy members.
Claim 9
Dependent Claim
119 words
An offshore tower transport and launch apparatus as defined in claim 6 wherein said generally transverse member of each of said bifurcated tubular sections comprises: first and second sloping legs connected at one of the ends thereof to one each of the spaced generally parallel tubular legs of the bifurcated section and having axes of said sloping legs intersecting a longitudinal axis of a corresponding unitary tubular section with a mutually equal angular relationship; and a cylindrical structural key extending through the junction of said sloping legs and said unitary tubular portion and having an axis thereof extending normal to the axes of the unitary tubular portion and each of said sloping legs at the intersection of said axes.
Claim 10
Dependent Claim
51 words
An offshore tower transport and launch apparatus as defined in claim 2 wherein: each of said first and second tubular buoyancy members are provided with a plurality of transversely extending bulkheads at longitudinally spaced locations along the length thereof for facilitating the regulation of buoyancy within the transport and launch apparatus.
Claim 11
Dependent Claim
34 words
An offshore tower transport and launch apparatus as defined in claim 8 and further comprising: a unitary columnar member coaxially extending within each of said first and second tubular buoyancy members between adjacent bulkheads.
Claim 12
Dependent Claim
42 words
An offshore tower transport and launch apparatus as defined in claim 2 wherein said means for releasably connecting comprises at least: pivotal connecting means extending between base portions of the offshore tower and lowermost portions of each of said bifurcated tubular sections.
Claim 13
Independent Claim
297 words
An apparatus for transporting an offshore tower generally upon the surface of a body of water and controllably lowering the tower onto the bed of a body of water at a preselected marine site comprising: a first watertight unitary tubular member having a generally continuous outer shell and a central longitudinal axis; means for releasably connecting said first watertight tubular member along a lateral portion of at least one leg of an offshore tower; a first pair of spaced generally coextensive watertight tubular membeRs having generally continuous outer shells and centrally mutually parallel longitudinally extending axes; means for releasably connecting said first pair of spaced watertight tubular members to a lateral base portion of said at least one leg of the offshore tower; means connecting between one of the ends of said first pair of spaced tubular members and one end of said first watertight tubular member for forming a generally tuning fork-shaped buoyancy structure; a second watertight unitary tubular member, connected to said first watertight unitary tubular member, having a generally continuous outer shell and a central longitudinal axis; means for releasably connecting said second watertight tubular member along a lateral portion of at least a second leg of the offshore tower; a second pair of spaced generally coextensive watertight tubular members having generally continuous outer shells and central mutually parallel longitudinally extending axes; means for releasably connecting said second pair of spaced watertight tubular members to a lateral base portion of said at least a second leg of the offshore tower; means connected between one of the ends of said second pair of spaced tubular members and one end of said second watertight tubular member for forming a generally tuning fork-shaped buoyancy structure and means transversely interconnecting said first and second unitary tubular buoyancy members.
Claim 14
Independent Claim
297 words
An apparatus for transporting an offshore tower generally upon the surface of a body of water and controllably lowering the tower onto the bed of a body of water at a preselected marine site comprising: a first watertight unitary tubular member having a generally continuous outer shell and a central longitudinal axis; means for releasably connecting said first watertight tubular member along a lateral portion of at least one leg of an offshore tower; a first pair of spaced generally coextensive watertight tubular membeRs having generally continuous outer shells and centrally mutually parallel longitudinally extending axes; means for releasably connecting said first pair of spaced watertight tubular members to a lateral base portion of said at least one leg of the offshore tower; means connecting between one of the ends of said first pair of spaced tubular members and one end of said first watertight tubular member for forming a generally tuning fork-shaped buoyancy structure; a second watertight unitary tubular member, connected to said first watertight unitary tubular member, having a generally continuous outer shell and a central longitudinal axis; means for releasably connecting said second watertight tubular member along a lateral portion of at least a second leg of the offshore tower; a second pair of spaced generally coextensive watertight tubular members having generally continuous outer shells and central mutually parallel longitudinally extending axes; means for releasably connecting said second pair of spaced watertight tubular members to a lateral base portion of said at least a second leg of the offshore tower; means connected between one of the ends of said second pair of spaced tubular members and one end of said second watertight tubular member for forming a generally tuning fork-shaped buoyancy structure and means transversely interconnecting said first and second unitary tubular buoyancy members.
Claim 15
Dependent Claim
229 words
An apparatus as defined in claim 11 wherein said means connecting each of said first pair and said second pair of spaced generally coextensive watertight tubular members to a corresponding first and second watertight unitary tubular member comprises: a first watertight tubular connecting member, having a continuous outer shell and a central longitudinal axis, connected at one end thereof to one end of one of said pair of spaced tubular members and connected at the other end thereof to said unitary tubular member in an inclined posture wherein the central longitudinal axis of said first watertight tubular connecting member intersects the longitudinal axis of said unitary tubular member at an angle of approximately 120*; and a second watertight tubular connecting member, having a continuous outer shell and a central longitudinal axis, connected at one end thereof to one end of the other one of said pair of spaced tubular members and connected at the other end thereof to said unitary tubular member in an inclined posture wherein the central longitudinal axis of said second watertight tubular connecting member intersects the intersection, of the central longitudinal axis of said first watertight tubular member with the central longitudinal axis of said unitary watertight tubular member, at an angle of approximately 120* with respect to the central longitudinal axis of each of said first watertight connecting member and said unitary tubular member.
Claim 16
Dependent Claim
78 words
Apparatus as defined in claim 12 and further comprising: a tubular structural key extending through the intersection of said central axes of said unitary tubular member and said first and second tubular connecting members, said structural key having a central longitudinal axis extending normal to the axes of the tubular members at the point of intersection thereof; and a plurality of bulkheads one extending between each of the intersecting ends of said tubular members and said structural key.
Claim 17
Dependent Claim
101 words
An apparatus as defined in claim 11 wherein said means for releasably connecting the first and second pair of spaced generally coextensive watertight tubular members with a lateral base portion of at least a first and at least a second leg of an offshore tower comprises: a pivotal connection means extending between said first pair of spaced generally coextensive watertight tubular members and said at least a first leg of the offshore tower; and a pivotal connection means extending between said second pair of spaced generally coextensive watertight tubular members and said at least a second leg of the offshore tower.
Claim 18
Dependent Claim
49 words
An apparatus as defined in claim 11 and further comprising: a plurality of transversely extending tubular buoyancy chambers interconnecting said first and second unitary watertight tubular members; and a plurality of transversely extending tubular buoyancy chambers interconnecting said first and second pair of spaced generally coextensive watertight tubular members.
Claim 19
Dependent Claim
58 words
An apparatus as defined in claim 15 wherein: said longitudinal extent of the transverse tubular members connected between the unitary tubular members at the end remote from said pair of spaced tubular members is less than at the end adjacent said pair of spaced tubular members whereby the apparatus in plan view generally assumes a truncated A-shaped configuration.
Claim 20
Dependent Claim
41 words
An apparatus as defined in claim 11 wherein: said first and second tubular watertight members are each provided with a plurality of transversely extending bulkheads laterally spaced along the length thereof for assisting in controllably regulating the buoyancy of the apparatus.
Claim 21
Dependent Claim
31 words
An apparatus as defined in claim 17 and further comprising: a unitary columnar member coaxially extending within each of said first and second watertight unitary tubular members along the length thereof.
Claim 22
Dependent Claim
35 words
An apparatus as defined in claim 17 and further comprising: at least one bulkhead in each of the tubular members of said first pair and said second pair of spaced generally coextensive watertight tubular members.
Claim 23
Independent Claim
154 words
A method for transporting and launching an offshore tower comprising the steps of: floating an offshore tower in a generally horizontal posture to a preselected marine site upon a buoyancy means connected to the lateral surface thereof; ballasting said buoyancy means to lower the offshore tower into the body of water and into a generally vertical posture resting upon the bed of the body of water; releasing the buoyancy means from connection along the lateral extent of the offshore tower while maintaining a pivotal connection between a lowermost portion of the buoyancy means and a base portion of the offshore tower; pivoting the buoyancy means, about the pivotal connection between a lowermost portion of the buoyancy means and a base portion of the offshore tower, away from the offshore tower; and completely releasing the buoyancy means from the offshore tower at the pivotal connection and towing the buoyancy means away from the offshore tower.
Claim 24
Independent Claim
154 words
A method for transporting and launching an offshore tower comprising the steps of: floating an offshore tower in a generally horizontal posture to a preselected marine site upon a buoyancy means connected to the lateral surface thereof; ballasting said buoyancy means to lower the offshore tower into the body of water and into a generally vertical posture resting upon the bed of the body of water; releasing the buoyancy means from connection along the lateral extent of the offshore tower while maintaining a pivotal connection between a lowermost portion of the buoyancy means and a base portion of the offshore tower; pivoting the buoyancy means, about the pivotal connection between a lowermost portion of the buoyancy means and a base portion of the offshore tower, away from the offshore tower; and completely releasing the buoyancy means from the offshore tower at the pivotal connection and towing the buoyancy means away from the offshore tower.
Claim 25
Dependent Claim
43 words
A method for transporting and launching an offshore tower as defined in claim 20 and further comprising, prior to pivoting the buoyancy means about the base of the offshore tower, the step of: deballasting the buoyancy means to generally a neutral buoyancy condition.
Claim 26
Dependent Claim
63 words
A method for transporting and launching an offshore tower as defined in claim 20 and further comprising, following the step of completely releasing, the steps of: deballasting the buoyancy means to raise the buoyancy means to the surface of the body of water; and simultaneously towing the buoyancy means away from the offshore tower resting upon the bed of the body of water.
Claim 27
Independent Claim
271 words
A method for transporting and launching an offshore tower comprising the steps of: floating an offshore tower generally in a horizontal posture to a preselected marine site upon a first and second tubular buoyancy means connected along the lateral extent thereof to at least a first and second leg of the offshore tower respectively, wherein each of said first and second buoyancy means includes a unitary tubular section and a bifurcated tubular section connected at one end to the unitary tubular section; at least partially flooding said first and second tubular buoyancy means wherein the bifurcated tubular section of one of said first and second tubular buoyancy means is flooded at a greater rate than the other of said bifurcated tubular section of the other of said first and second tubular buoyancy means, for inducing a roll of the offshore tower approximately about a central longitudinal axis of the offshore tower and into the body of water; flooding the bifurcated tubular section or the other of said first and second tubular buoyancy means to at least equal buoyancy with the one bifurcated tubular section to even the ballast between the first and second bifurcated tubular sections of the buoyancy means, for inducing a counterroll of the offshore tower approximately about a central longitudinal axis of the offshore tower and into the body of water; flooding at least a portion of said unitary tubular portions of said first and second tubular buoyancy means to pitch the offshore tower into a generally vertical posture within the body of water; and lowering the righted offshore tower onto the bed of a body of water.
Claim 28
Independent Claim
271 words
A method for transporting and launching an offshore tower comprising the steps of: floating an offshore tower generally in a horizontal posture to a preselected marine site upon a first and second tubular buoyancy means connected along the lateral extent thereof to at least a first and second leg of the offshore tower respectively, wherein each of said first and second buoyancy means includes a unitary tubular section and a bifurcated tubular section connected at one end to the unitary tubular section; at least partially flooding said first and second tubular buoyancy means wherein the bifurcated tubular section of one of said first and second tubular buoyancy means is flooded at a greater rate than the other of said bifurcated tubular section of the other of said first and second tubular buoyancy means, for inducing a roll of the offshore tower approximately about a central longitudinal axis of the offshore tower and into the body of water; flooding the bifurcated tubular section or the other of said first and second tubular buoyancy means to at least equal buoyancy with the one bifurcated tubular section to even the ballast between the first and second bifurcated tubular sections of the buoyancy means, for inducing a counterroll of the offshore tower approximately about a central longitudinal axis of the offshore tower and into the body of water; flooding at least a portion of said unitary tubular portions of said first and second tubular buoyancy means to pitch the offshore tower into a generally vertical posture within the body of water; and lowering the righted offshore tower onto the bed of a body of water.
Claim 29
Dependent Claim
44 words
A method for transporting and launching an offshore tower as defined in claim 23 and further comprising, following said step of lowering, the step of: removing the first and second tubular buoyancy means from the lateral surface of the offshore tower for subsequent reuse.
Claim 30
Dependent Claim
103 words
A method for transporting and launching an offshore tower as defined in claim 24 wherein said stop of removing comprises: releasing the first and second tubular buoyancy means along the lateral extent thereof from the lateral surface of the offshore tower; deballasting to generally neutral buoyancy the first and second tubular buoyancy means; pivoting the first and second buoyancy means about a pivotal base connection thereof with the offshore tower; releasing the pivotal connection between the first and second tubular buoyancy means and the base of the offshore tower; and towing the first and second tubular buoyancy means away from the offshore tower.
Claim 31
Dependent Claim
62 words
A method for transporting and launching an offshore tower as defined in claim 25 and further comprising, following said step of towing, the step of: deballasting the first and second tubular buoyancy means to raise said means to the surface of the body of water for horizontally towing the buoyancy means within the body of water back to a tower fabrication facility.
Claim 32
Independent Claim
261 words
A method for transporting and launching an offshore tower comprising: floating an offshore tower in a generally horizontal posture to a preselected offshore site resting upon a first and second tubular buoyancy means connected along the lateral extent of the offshore tower, wherein each of said first and second buoyancy means includes a unitary tubular section and a bifurcated tubular section connected at one end thereof and said first and second tubular buoyancy means being interconnected by a plurality of transversely extending tubular buoyancy members; flooding each of said plurality of transverse tubular members for lowering the profile of the horizontally disposed offshore tower with respect to the body of water; flooding at least the interior ones of the bifurcated tubular sections of the first and second tubular buoyancy means to further lower the profile of the generally horizontally disposed offshore tower within the body of water; flooding at least a portion of the unitary legs of said first and second tubular buoyancy means to pitch the offshore tower into a generally vertical posture within the body of water; lowering the righted offshore tower onto the bed of the body of water; pinning the offshore tower to the bed of the body of water; pivoting the first and second tubular buoyancy means away from the lateral surface of the offshore tower about a pitoval connection between a base portion of the offshore tower and a base portion of the first and second tubular buoyancy means; and removing the first and second tubular buoyancy means from the offshore tower for subsequent reuse.
Claim 33
Independent Claim
261 words
A method for transporting and launching an offshore tower comprising: floating an offshore tower in a generally horizontal posture to a preselected offshore site resting upon a first and second tubular buoyancy means connected along the lateral extent of the offshore tower, wherein each of said first and second buoyancy means includes a unitary tubular section and a bifurcated tubular section connected at one end thereof and said first and second tubular buoyancy means being interconnected by a plurality of transversely extending tubular buoyancy members; flooding each of said plurality of transverse tubular members for lowering the profile of the horizontally disposed offshore tower with respect to the body of water; flooding at least the interior ones of the bifurcated tubular sections of the first and second tubular buoyancy means to further lower the profile of the generally horizontally disposed offshore tower within the body of water; flooding at least a portion of the unitary legs of said first and second tubular buoyancy means to pitch the offshore tower into a generally vertical posture within the body of water; lowering the righted offshore tower onto the bed of the body of water; pinning the offshore tower to the bed of the body of water; pivoting the first and second tubular buoyancy means away from the lateral surface of the offshore tower about a pitoval connection between a base portion of the offshore tower and a base portion of the first and second tubular buoyancy means; and removing the first and second tubular buoyancy means from the offshore tower for subsequent reuse.
Claim 34
Dependent Claim
91 words
A method for transporting and launching an offshore tower as defined in claim 27 and further comprising, prior to said step of pIvoting, the steps of: releasing lateral connections except base pivotal connections between the first and second tubular buoyancy means and the offshore tower; and deballasting the first and second tubular buoyancy means sufficiently to induce pivoting of the first and second tubular buoyancy means about the base pivotal connections into a generally vertical posture within the body of water and away from the lateral surface of the offshore tower.
Claim 35
Dependent Claim
53 words
A method for transporting and launching an offshore tower as defined in claim 28 wherein said step of removing comprises: releasing the pivotal connection between the base of the offshore tower and the first and second tubular buoyancy means; and towing the first and second tubular buoyancy means away from the offshore tower.
Claim 36
Dependent Claim
43 words
A method for transporting and launching an offshore tower as defined in claim 28 and further comprising, following said step of deballasting, the step of: pulling the first and second tubular buoyancy means for pivoting said buoyancy means away from the offshore tower.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |