US4692402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrathin optical recording medium with moisture barrier
Assignee: LaserCard Corp
•
Filing: 1986-05-02
•
Granted: 1987-09-08
•
Expires: 2006-05-02
Abstract
Abstract An optical data storage medium, such as a data card with a strip of optical data storage material, having a thickness approximately that of a credit card and one or more moisture barrier layers. One of the moisture barrier layers is an underlayer between substrate or card base and the storage material, while a second moisture barrier layer is one or more of the transparent laminating sheet and protective layers adhered above the storage material. The barrier layers may be any of the transparent materials, having a maximum moisture vapor transmission rate of 0.1 grams water vapor/100 inch square/mil/24 hours at 38 C and 90% relative humidity, such as polytrichlorofluoroethylene and polyvinylidene chloride. The underlayer may also be a nontransparent aluminum layer.
Inventors
- 👤 Eric Bouldin
- 👤 Richard Haddock
- 👤 Christopher J. Dyball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:21
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/02; G11; G11B; G11B7/00; G11B7/24; G11B7/24003; G11B7/24012; G11B7/2403; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
42 words
An optical data storage medium comprising, a laser recordable data storage material disposed on a substrate, and a transparent, hydrophobic laminating sheet covering said storage material, the substrate, storage material and laminating sheet having a maximum total thickness not exceeding 40 mils.
Claim 2
Dependent Claim
42 words
An optical data storage medium comprising, a laser recordable data storage material disposed on a substrate, and a transparent, hydrophobic laminating sheet covering said storage material, the substrate, storage material and laminating sheet having a maximum total thickness not exceeding 40 mils.
Claim 3
Dependent Claim
25 words
The storage medium of claim 1 further comprising a moisture barrier underlayer beneath said storage material to space apart said substrate and said storage material.
Claim 4
Dependent Claim
41 words
The storage medium of claim 2 wherein said moisture barrier underlayer comprises a hydrophobic material having a maximum moisture vapor transmission rate of 0.1 grams water vapor/100 square inches surface /mil thickness/24 hours measured at 38° C. and 90% relative humidity.
Claim 5
Dependent Claim
35 words
The storage medium of claim 3 wherein said hydrophobic material of said underlayer is selected from the group consisting of polytrichlorofluoroethylene, or its copolymers, polyvinylidene chloride, or its copolymers, aluminum foil and vapor deposited aluminum.
Claim 6
Dependent Claim
20 words
The storage medium of claim 2 wherein said underlayer has a width approximately equal to a width of the substrate.
Claim 7
Dependent Claim
21 words
The storage medium of claim 2 wherein said underlayer has a width approximately equal to a width of the storage material.
Claim 8
Dependent Claim
40 words
The storage medium of claim 1 wherein said transparent hydrophobic laminating sheet comprises a material having a maximum moisture vapor transmission rate of 0.1 grams water vapor/100 square inches surface/mil thickness/24 hours measured at 38° C. and 90% relative humidity.
Claim 9
Dependent Claim
30 words
The storage medium of claim 7 wherein said material of said laminating sheet is selected from the group consisting of polytrichlorofluoroethylene, or its copolymers, and polyvinylidene chloride, or its copolymers.
Claim 10
Dependent Claim
12 words
The storage medium of claim 1 wherein said substrate comprises polytrichlorofluoroethylene materials.
Claim 11
Dependent Claim
15 words
The storage medium of claim 1 wherein said substrate is a wallet-size plastic card base.
Claim 12
Dependent Claim
25 words
The storage medium of claim 1 wherein said laser recordable data storage material comprises a suspension of reflective metal particles in an organic colloid matrix.
Claim 13
Dependent Claim
53 words
An ultrathin moisture resistant data card comprising, a wallet-size plastic card base, a strip of laser recordable material disposed on said card base, and a transparent hydrophobic laminating sheet covering said strip, the card base, the strip of laser recordable material and the sheet having a maximum total thickness not exceeding 40 mils.
Claim 14
Dependent Claim
53 words
An ultrathin moisture resistant data card comprising, a wallet-size plastic card base, a strip of laser recordable material disposed on said card base, and a transparent hydrophobic laminating sheet covering said strip, the card base, the strip of laser recordable material and the sheet having a maximum total thickness not exceeding 40 mils.
Claim 15
Dependent Claim
19 words
The data card of claim 12 further comprising a moisture barrier underlayer between said card base and said strip.
Claim 16
Dependent Claim
43 words
The data card of claim 13 wherein said moisture barrier underlayer comprises a hydrophobic material having a maximum moisture vapor transmission rate of 0.1 grams water vapor /100 square inches surface /mil thickness/ 24 hours measured at 38° C. and 90% relative humidity.
Claim 17
Dependent Claim
31 words
The data card of claim 14 wherein said hydrophobic material of said underlayer is selected from the group consisting of polytrichlorofluoroethylene copolymers, polyvinylidene copolymers chloride, aluminum foil and vapor deposited aluminum.
Claim 18
Dependent Claim
21 words
The data card of claim 13 wherein said underlayer has a width approximately equal to a width of the card base.
Claim 19
Dependent Claim
24 words
The data card of claim 13 wherein said underlayer has a width approximately equal to a width of the strip of laser recordable material.
Claim 20
Dependent Claim
41 words
The data card of claim 12 wherein said transparent hydrophobic laminating sheet comprises a material having a maximum moisture vapor, transmission rate of 0.1 grams water vapor /100 square inches surface/mil thicknes/24 hours measured at 38° C. and 90% relative humidity.
Claim 21
Dependent Claim
26 words
The data card of claim 18 wherein said material of said laminating sheet is selected from the group consisting of polytrichlorofluoroethylene copolymers and polyvinylidene chloride copolymers.
Claim 22
Dependent Claim
14 words
The data card of claim 12 wherein said card base comprises polytrichlorofluoroethylene copolymer material.
Claim 23
Dependent Claim
25 words
The data card of claim 12 wherein said strip of laser recordable material comprises a suspension of reflective metal particles in an organic colloid matrix.
Claim 24
Dependent Claim
129 words
An optical data storage medium comprising, a plastic, wallet-size base, a strip of laser recordable material disposed on said base, a transparent, hydrophobic laminating sheet covering said laser recordable material, said laminating sheet having a maximum moisture vapor transmission rate of 0.1 grams water vapor/100 square inches surface/mil thickness/24 hours measured at 38° C. and 90% relative humidity, and a moisture barrier underlayer beneath said laser recordable material to space apart said base and said laser recordable material, said moisture barrier having a maximum moisture vapor transmission rate of 0.1 grams water vapor/100 square inches surface/mil thickness/24 hours measured at 38° C. and 90% relative humidity, said laser recordable material, said base, said laminating sheet and said moisture barrier underlayer having an aggregate thickness of less than 41 mils.
Claim 25
Dependent Claim
129 words
An optical data storage medium comprising, a plastic, wallet-size base, a strip of laser recordable material disposed on said base, a transparent, hydrophobic laminating sheet covering said laser recordable material, said laminating sheet having a maximum moisture vapor transmission rate of 0.1 grams water vapor/100 square inches surface/mil thickness/24 hours measured at 38° C. and 90% relative humidity, and a moisture barrier underlayer beneath said laser recordable material to space apart said base and said laser recordable material, said moisture barrier having a maximum moisture vapor transmission rate of 0.1 grams water vapor/100 square inches surface/mil thickness/24 hours measured at 38° C. and 90% relative humidity, said laser recordable material, said base, said laminating sheet and said moisture barrier underlayer having an aggregate thickness of less than 41 mils.
Claim 26
Dependent Claim
31 words
The storage medium of claim 22 wherein said underlayer is selected from the group consisting of polytrichlorofluoroethylene, or its copolymers, polyvinylidene chloride, or its copolymers, aluminum foil and vapor deposited aluminum.
Claim 27
Dependent Claim
30 words
The storage medium of claim 22 wherein said material of said laminating sheet is selected from the group consisting of polytrichlorofluoroethylene, or its copolymers, and polyvinylidene chloride, or its copolymers.
Claim 28
Dependent Claim
25 words
The storage medium of claim 22 wherein said strip of laser recordable material comprises a suspension of reflective metal particles in an organic colloid matrix.
References Cited (Backward Citations)
US4273815A
Cited
US4230939A
Cited
US4239826A
Cited
US4314260A
Cited
US4360820A
Cited
US4318970A
Cited
US4394661A
Cited
US4340655A
Cited
US4360728A
Cited
US4383024A
Cited
US4581267A
Cited
US4584259A
Cited
US4606017A
Cited
US4607264A
Cited
US4616238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |