Patent CA855679A successfully refreshed from Google Patents.
Patent US4129801A successfully refreshed from Google Patents.
US4129801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode for cathode ray tube of directly heating type and process for producing the same cathode
Assignee: Hitachi Ltd
•
Filing: 1977-07-06
•
Granted: 1978-12-12
•
Expires: 1997-07-06
Abstract
Abstract The present cathode for cathode ray tube of directly heating type is characterized by comprising a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a flat metal plate of nickel- or cobalt-based alloy, a bonding layer having an uneven surface prepared by diffusion bonding by heating a powder layer comprising powders of alloy or mixture of nickel and cobalt formed on the flat part, to which a thermionic emission layer is to be bonded, and the thermionic emission layer, and has a very small deformation when used and a longer life. A cathode with much less deformation and much longer life can be obtained by using a cathode substrate body prepared from a flat metal plate provided with a thinner metal layer of at least one of nickel and cobalt on its surface than the flat metal plate by diffusion bonding. A cathode with much less deformation after the service for a long period and much longer life is obtained by using a cathode substrate body prepared from a flat metal plate provided with a metal layer of at least one of nickel and cobalt having a smaller thickness on its surface than that of the flat metal plate by diffusion bonding, and then applying a plastic working to the flat metal plate to a desired thickness.
Inventors
- 👤 Ko Soeno
- 👤 Tomio Iizuka
- 👤 Toshio Doi
- 👤 Hisashi Ando
- 👤 Testuo Oyama
- 👤 Hiroshi Sakamoto
- 👤 Akira Misumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:14
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/04; H01J9/00; H01J9/02; H01J9/04
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
115 words
A cathode for cathode ray tube of directly heating type comprising a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a flat metal plate of nickel- or cobalt-based alloy; a bonding layer comprising heat-diffusible metals having an affinity to said flat metal plate, and having an uneven surface, formed on an outer surface of said flat part by diffusion bonding, to whose surface a thermionic emission layer is to be bonded, and the thermionic emission layer formed on the surface of the bonding layer, wherein an improvement comprises the bonding layer consisting of nickel and cobalt.
Claim 2
Dependent Claim
115 words
A cathode for cathode ray tube of directly heating type comprising a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a flat metal plate of nickel- or cobalt-based alloy; a bonding layer comprising heat-diffusible metals having an affinity to said flat metal plate, and having an uneven surface, formed on an outer surface of said flat part by diffusion bonding, to whose surface a thermionic emission layer is to be bonded, and the thermionic emission layer formed on the surface of the bonding layer, wherein an improvement comprises the bonding layer consisting of nickel and cobalt.
Claim 3
Dependent Claim
27 words
A cathode according to claim 1, wherein the bonding layer consists of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt.
Claim 4
Dependent Claim
44 words
A cathode according to claim 1, wherein said flat metal plate is comprised of an alloy of 15 to 30% by weight of at least one of tungsten and molybdenum, and 0.1 to 1.5% by weight of zirconium, the balance being nickel or cobalt.
Claim 5
Dependent Claim
140 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone, or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt; a bonding layer of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt having an uneven surface, formed on an outer surface of said flat part by diffusion bonding, to whose surface a thermionic emission layer is bonded; and the thermionic emission layer formed on the surface of said bonding layer.
Claim 6
Dependent Claim
140 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone, or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt; a bonding layer of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt having an uneven surface, formed on an outer surface of said flat part by diffusion bonding, to whose surface a thermionic emission layer is bonded; and the thermionic emission layer formed on the surface of said bonding layer.
Claim 7
Dependent Claim
45 words
A cathode according to claim 4, wherein the metal layer consists of not more than 10% by weight of at least one of tungsten and molybdenum, and not more than 1.5% by weight of zirconium, the balance being at least one of nickel and cobalt.
Claim 8
Dependent Claim
27 words
A cathode according to claim 4, wherein the bonding layer consists of 35 to 65% by weight of nickel and 35 to 65% by weight of cobalt.
Claim 9
Dependent Claim
44 words
A cathode according to claim 4, wherein said flat metal plate is comprised of an alloy of 15 to 30% by weight of at least one of tungsten and molybdenum, and 0.1 to 1.5% by weight of zirconium, the balance being nickel or cobalt.
Claim 10
Dependent Claim
115 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a compound plate formed by diffusion bonding to a flat metal plate of nickel- or cobalt-based alloy a metal layer having an affinity to said flat metal plate; a bonding layer of nickel and cobalt, formed on an outer surface of said flat part by diffusion bonding, having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and the thermionic emission layer formed on the surface of the bonding layer.
Claim 11
Dependent Claim
115 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a compound plate formed by diffusion bonding to a flat metal plate of nickel- or cobalt-based alloy a metal layer having an affinity to said flat metal plate; a bonding layer of nickel and cobalt, formed on an outer surface of said flat part by diffusion bonding, having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and the thermionic emission layer formed on the surface of the bonding layer.
Claim 12
Dependent Claim
169 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a compound plate formed by diffusion bonding to a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone, or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt a plating layer of at least one of nickel and cobalt 1 to 15% as thick as the flat metal plate; a bonding layer of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt having an uneven surface, formed on an outer surface of said flat part by diffusion bonding, to whose surface a thermionic emission layer is bonded; and the thermionic emission layer formed on the surface of said bonding layer.
Claim 13
Dependent Claim
169 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a compound plate formed by diffusion bonding to a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone, or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt a plating layer of at least one of nickel and cobalt 1 to 15% as thick as the flat metal plate; a bonding layer of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt having an uneven surface, formed on an outer surface of said flat part by diffusion bonding, to whose surface a thermionic emission layer is bonded; and the thermionic emission layer formed on the surface of said bonding layer.
Claim 14
Dependent Claim
131 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by forming on a flat metal plate of nickel- or cobalt-based alloy a metal layer having an affinity to the flat metal plate by diffusion bonding, then applying a plastic working to the flat metal plate, thereby forming a compound plate, and shaping the compound plate; a bonding layer of nickel and cobalt, formed on an outer surface of said flat part by diffusion bonding, having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and the thermionic emission layer formed on the surface of the bonding layer.
Claim 15
Dependent Claim
131 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by forming on a flat metal plate of nickel- or cobalt-based alloy a metal layer having an affinity to the flat metal plate by diffusion bonding, then applying a plastic working to the flat metal plate, thereby forming a compound plate, and shaping the compound plate; a bonding layer of nickel and cobalt, formed on an outer surface of said flat part by diffusion bonding, having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and the thermionic emission layer formed on the surface of the bonding layer.
Claim 16
Dependent Claim
44 words
A cathode according to claim 10, wherein said flat metal plate is comprised of an alloy of 15 to 30% by weight of at least one of tungsten and molybdenum, and 0.1 to 1.5% by weight of zirconium, the balance being nickel or cobalt.
Claim 17
Dependent Claim
27 words
A cathode according to claim 10, wherein the bonding layer consists of 35 to 65% by weight of nickel and 35 to 65% by weight of cobalt.
Claim 18
Dependent Claim
45 words
A cathode according to claim 10, wherein the metal layer consists of not more than 10% by weight of at least one of tungsten and molybdenum, and not more than 1.5% by weight of zirconium, the balance being at least one of nickel and cobalt.
Claim 19
Dependent Claim
189 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a compound plate formed by diffusion bonding to a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone, or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt a plating layer of at least one of nickel and cobalt 1 to 15% as thick as the flat plate, then cold rolling the flat metal plate to a desired thickness, thereby forming a compound plate, and shaping the compound plate; a bonding layer of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt having an uneven surface, formed on an outer surface of said flat part by diffusion bonding, to whose surface a thermionic emission layer is bonded; and the thermionic emission layer formed on the surface of said bonding layer.
Claim 20
Dependent Claim
189 words
A cathode for cathode ray tube of directly heating type, which comprises a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece, prepared by shaping a compound plate formed by diffusion bonding to a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone, or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt a plating layer of at least one of nickel and cobalt 1 to 15% as thick as the flat plate, then cold rolling the flat metal plate to a desired thickness, thereby forming a compound plate, and shaping the compound plate; a bonding layer of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt having an uneven surface, formed on an outer surface of said flat part by diffusion bonding, to whose surface a thermionic emission layer is bonded; and the thermionic emission layer formed on the surface of said bonding layer.
Claim 21
Dependent Claim
140 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises shaping a flat metal plate of nickel- or cobalt-based alloy into a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece; forming a heat-diffusible metal powder layer having an affinity to said flat metal plate on an outer surface of said flat part, heating the powder layer, thereby diffusion bonding the powder layer to the flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the bonding layer, wherein an improvement comprises said bonding layer being comprised of powders of nickel- cobalt alloy or powdery mixture of nickel and cobalt.
Claim 22
Dependent Claim
140 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises shaping a flat metal plate of nickel- or cobalt-based alloy into a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece; forming a heat-diffusible metal powder layer having an affinity to said flat metal plate on an outer surface of said flat part, heating the powder layer, thereby diffusion bonding the powder layer to the flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the bonding layer, wherein an improvement comprises said bonding layer being comprised of powders of nickel- cobalt alloy or powdery mixture of nickel and cobalt.
Claim 23
Dependent Claim
41 words
A process according to claim 15, wherein said powdery layer of powders of nickel-cobalt alloy or powdery mixture of nickel and cobalt has a composition of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt.
Claim 24
Dependent Claim
44 words
A process according to claim 15, wherein said flat metal plate is comprised of an alloy of 15 to 30% by weight of at least one of tungsten and molybdenum, and 0.1 to 1.5% by weight of zirconium, the balance being nickel or cobalt.
Claim 25
Dependent Claim
168 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises shaping a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt into a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece; forming a powder layer of alloy powders or powdery mixture of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt on an outer surface of said flat plate, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 26
Dependent Claim
168 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises shaping a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt into a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece; forming a powder layer of alloy powders or powdery mixture of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt on an outer surface of said flat plate, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 27
Dependent Claim
45 words
A method according to claim 18, wherein said metal layer consists of not more than 10% by weight of at least one of tungsten and molybdenum, and not more than 1.5% by weight of zirconium, the balance being at least one of nickel and cobalt.
Claim 28
Dependent Claim
143 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises shaping a compound plate prepared by diffusion bonding onto a flat metal plate of nickel- or cobalt-based alloy a metal layer having an affinity to said flat metal plate into a cathode substrate body having two leg pieces extended in the same direction, and a flat part connected to one end of each leg piece; forming a powder layer of powders of nickel-cobalt alloy or powdery mixture of nickel and cobalt on an outer surface of said flat part, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 29
Dependent Claim
143 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises shaping a compound plate prepared by diffusion bonding onto a flat metal plate of nickel- or cobalt-based alloy a metal layer having an affinity to said flat metal plate into a cathode substrate body having two leg pieces extended in the same direction, and a flat part connected to one end of each leg piece; forming a powder layer of powders of nickel-cobalt alloy or powdery mixture of nickel and cobalt on an outer surface of said flat part, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 30
Dependent Claim
41 words
A process according to claim 19, wherein said powder layer of powders of nickel-cobalt alloy or powdery mixture of nickel and cobalt has a composition of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt.
Claim 31
Dependent Claim
44 words
A process according to claim 20, wherein said flat metal plate is comprised of an alloy of 15 to 30% by weight of at least one of tungsten and molybdenum, and 0.1 to 1.5% by weight of zirconium, the balance being nickel or cobalt.
Claim 32
Dependent Claim
200 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises diffusion bonding onto a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt a plating layer of at least one of nickel and cobalt 1 to 15% as thick as said flat metal plate, thereby forming a compound plate, shaping the compound plate into a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece; forming a powder layer of alloy powders or powdery mixture of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt on an outer surface of said flat plate, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 33
Dependent Claim
200 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises diffusion bonding onto a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt a plating layer of at least one of nickel and cobalt 1 to 15% as thick as said flat metal plate, thereby forming a compound plate, shaping the compound plate into a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece; forming a powder layer of alloy powders or powdery mixture of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt on an outer surface of said flat plate, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 34
Dependent Claim
154 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises shaping a compound plate prepared by diffusion bonding onto a flat metal plate of nickel- or cobalt-based alloy a metal layer having an affinity to said flat metal plate and plastic working the flat metal plate to a desired thickness into a cathode substrate body having two leg pieces extended in the same direction, and a flat part connected to one end of each leg piece; forming a powder layer of powders of nickel-cobalt alloy or powdery mixture of nickel and cobalt on an outer surface of said flat part, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 35
Dependent Claim
154 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises shaping a compound plate prepared by diffusion bonding onto a flat metal plate of nickel- or cobalt-based alloy a metal layer having an affinity to said flat metal plate and plastic working the flat metal plate to a desired thickness into a cathode substrate body having two leg pieces extended in the same direction, and a flat part connected to one end of each leg piece; forming a powder layer of powders of nickel-cobalt alloy or powdery mixture of nickel and cobalt on an outer surface of said flat part, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 36
Dependent Claim
44 words
A process according to claim 24, wherein said flat metal plate is comprised of an alloy of 15 to 30% by weight of at least one of tungsten and molybdenum, and 0.1 to 1.5% by weight of zirconium, the balance being nickel or cobalt.
Claim 37
Dependent Claim
41 words
A process according to claim 24, wherein said powder layer of powders of nickel-cobalt alloy or powdery mixture of nickel and cobalt has a composition of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt.
Claim 38
Dependent Claim
45 words
A method according to claim 24, wherein said metal layer consists of not more than 10% by weight of at least one of tungsten and molybdenum, and not more than 1.5% by weight of zirconium, the balance being at least one of nickel and cobalt.
Claim 39
Dependent Claim
210 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises diffusion bonding onto a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt a plating layer of at least one of nickel and cobalt 1 to 15% as thick as said flat metal plate, cold rolling the flat metal plate to a desired thickness, thereby forming a compound plate, shaping the compound plate into a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece; forming a powder layer of alloy powders or powdery mixture of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt on an outer surface of said flat plate, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 40
Dependent Claim
210 words
A process for producing a cathode for cathode ray tube of directly heating type, which comprises diffusion bonding onto a flat metal plate of 25 to 30% by weight of tungsten or molybdenum alone or 25 to 30% by weight in total of tungsten and molybdenum in mixture, and 0.2 to 0.8% by weight of zirconium, the balance being nickel or cobalt a plating layer of at least one of nickel and cobalt 1 to 15% as thick as said flat metal plate, cold rolling the flat metal plate to a desired thickness, thereby forming a compound plate, shaping the compound plate into a cathode substrate body having two leg pieces extended in the same direction and a flat part connected to one end of each leg piece; forming a powder layer of alloy powders or powdery mixture of 35 to 65% by weight of nickel and 65 to 35% by weight of cobalt on an outer surface of said flat plate, and heating said powder layer, thereby diffusion bonding said powder layer to said flat part and forming a bonding layer having an uneven surface, to whose surface a thermionic emission layer is to be bonded; and forming the thermionic emission layer on the surface of the bonding layer.
Claim 41
Dependent Claim
16 words
A process according to claim 28, wherein said flat metal plate is prepared by powder metallurgy.
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) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |