US4569903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical recording medium
Assignee: Fujifilm Holdings Corp
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Filing: 1984-10-25
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Granted: 1986-02-11
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Expires: 2004-10-25
Abstract
Abstract A recording medium for reflective readout in an optical information recording system. The medium comprises a substrate such as PET or PMMA on emulsion layer of silver halide material and an optical protective layer. The emulsion is exposed to a laser source to form a latent data image and is then developed to exhibit a glossy silver metallic image. Playback uses established systems.
Inventors
- 👤 Masakazu Hashiue
- 👤 Koji Ochiai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:55
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/04; G03C5/26; G03C5/32; G03C5/40; G11; G11B; G11B7/00; G11B7/004; G11B7/0045; G11B7/00455; G11B7/24; G11B7/241; G11B7/242; G11B7/251; G11B7/28; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A method of optical data recording comprising the steps of, exposing a silver halide emulsion layer to modulated optical data by light focused by a focusing lens to form a latent image and developing said silver halide emulsion layer to form a reflective glossy metallic silver image having a light reflection greater than 10% on portions where said latent image exists.
Claim 2
Independent Claim
61 words
A method of optical data recording comprising the steps of, exposing a silver halide emulsion layer to modulated optical data by light focused by a focusing lens to form a latent image and developing said silver halide emulsion layer to form a reflective glossy metallic silver image having a light reflection greater than 10% on portions where said latent image exists.
Claim 3
Dependent Claim
16 words
The method of claim 1, further comprising the step of baking said glossy metallic silver image.
Claim 4
Dependent Claim
20 words
The method of claim 1, wherein the step of development comprises exposure of said emulsion surface to an oxidizing agent.
Claim 5
Dependent Claim
32 words
The method of claim 1, wherein the step of development comprises exposing said emulsion layer to a sulphur compound environment to induce physical development nuclei in said layer and subsequent photographic development.
Claim 6
Independent Claim
63 words
A method of optical data recording comprising the steps of, exposing a silver halide emulstion layer to modulated optical data by light focused by a focusing lens to form a latent image, developing the latent image and, heating the developed image to form a reflective glossy metallic silver image having a light reflection greater than 10% on portions where said developed silver exists.
Claim 7
Independent Claim
63 words
A method of optical data recording comprising the steps of, exposing a silver halide emulstion layer to modulated optical data by light focused by a focusing lens to form a latent image, developing the latent image and, heating the developed image to form a reflective glossy metallic silver image having a light reflection greater than 10% on portions where said developed silver exists.
Claim 8
Dependent Claim
45 words
The method of claim 1 or 5 wherein the step of exposing a silver halide emulsion layer to modulated optical data includes the step of forming a latent image of digital data and wherein said glossy metallic silver image is an optical digital data recording.
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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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |