US4680458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser recording and storage medium
Assignee: LaserCard Corp
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Filing: 1985-09-10
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Granted: 1987-07-14
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Expires: 2005-09-10
Abstract
Abstract An optical data recording and information storage medium which uses an exposed and developed photosensitive medium with a transparent substrate to store prerecorded data spots. A reflective laser recording metal layer is vapor deposited on the processed photosensitive medium so as to create laser recordable areas adjacent to the prerecorded data. The entire assembly is mounted on a base which may be transparent. A laser is used to write data spots on the thin metal layer. Both the prerecorded data spots and the laser written data spots are read by observing optical contrast with respect to the surrounding field.
Inventors
- 👤 Jerome Drexler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:24
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; G06K19/08; G06K19/083; G06K19/10; G06K19/14; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/25; G11; G11B; G11B17/00; G11B17/34; G11B7/00; G11B7/002; G11B7/0033; G11B7/24; G11B7/26; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
74 words
An optical data recording and information storage medium comprising, a transparent substrate and an overlying exposed and developed, high resolution emulsion layer, said emulsion layer containing prerecorded optically readable data spots, and a vapor deposited, optically reflective, laser recording layer disposed over said emulsion layer, said layer capable of recording laser written spots having a dimension in the range between 2 and 50 microns written at speeds of at least 1000 bits per second.
Claim 2
Dependent Claim
74 words
An optical data recording and information storage medium comprising, a transparent substrate and an overlying exposed and developed, high resolution emulsion layer, said emulsion layer containing prerecorded optically readable data spots, and a vapor deposited, optically reflective, laser recording layer disposed over said emulsion layer, said layer capable of recording laser written spots having a dimension in the range between 2 and 50 microns written at speeds of at least 1000 bits per second.
Claim 3
Dependent Claim
22 words
The medium of claim 1 disposed on a wallet-size plastic card base, said recording layer disposed proximate to said plastic card base.
Claim 4
Dependent Claim
11 words
The medium of claim 2 wherein said card base is transparent.
Claim 5
Dependent Claim
16 words
The medium of claim 1 where said prerecorded optically readable data spots are black filamentary silver.
Claim 6
Dependent Claim
21 words
The medium of claim 1 wherein said prerecorded data spots and said laser written data spots are approximately the same size.
Claim 7
Dependent Claim
18 words
The medium of claim 1 wherein said prerecorded data spots are the only data spots on said medium.
Claim 8
Dependent Claim
20 words
The medium of claim 1 wherein said prerecorded data spots are combined with laser recorded data spots on said medium.
Claim 9
Independent Claim
46 words
A method of making an optical information storage and recording medium comprising, photolithographically prerecording and processing data spots on a high resolution, photosensitive medium of the type having a transparent substrate, and vapor depositing a reflective metal layer onto said photosensitive medium distal to the substrate.
Claim 10
Independent Claim
46 words
A method of making an optical information storage and recording medium comprising, photolithographically prerecording and processing data spots on a high resolution, photosensitive medium of the type having a transparent substrate, and vapor depositing a reflective metal layer onto said photosensitive medium distal to the substrate.
Claim 11
Dependent Claim
30 words
The method of claim 8 further defined by recording laser written data spots onto said reflective metal layer, thereby producing prerecorded and laser written data spots in a common medium.
Claim 12
Dependent Claim
16 words
The method of claim 8 further defined by disposing said medium onto a wallet-size card base.
Claim 13
Dependent Claim
25 words
The method of claim 10 further defined by bonding a thin, dust and scratch protective transparent laminating material over the transparent substrate of said medium.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |