Patent US4510232A successfully refreshed from Google Patents.
US4510232A
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Optical data storage element
Assignee: Polaroid Corp
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Filing: 1984-02-15
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Granted: 1985-04-09
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Expires: 2004-02-15
Abstract
Abstract An element for optically recording digitally encoded information which comprises a support carrying an array of discrete regular geometric spaced depressions in a surface, each of said depressions carrying material capable of a transformation in response to a level of radiation adapted to effect said transformation, wherein said transformation is optically detectable.
Inventors
- 👤 Arthur M. Gerber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:47
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24306; G11B2007/24318; G11B2007/24324; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A method for optically recording digitally encoded information which comprises exposing an element to focussed radiation, said element comprising an array of discrete regular geometric spaced depressions in a surface, each of said depressions carrying a mixture of zinc and sulfur, said mixture capable of transformation in response to a level of radiation adapted to effect said transformation, wherein said transformation is optically detectable substantially immediately after exposure to said radiation.
Claim 2
Independent Claim
71 words
A method for optically recording digitally encoded information which comprises exposing an element to focussed radiation, said element comprising an array of discrete regular geometric spaced depressions in a surface, each of said depressions carrying a mixture of zinc and sulfur, said mixture capable of transformation in response to a level of radiation adapted to effect said transformation, wherein said transformation is optically detectable substantially immediately after exposure to said radiation.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said radiation is a laser beam.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein said depressions have a center-to-center spacing of about 0.5 to 10 micrometers.
Claim 5
Dependent Claim
15 words
The method of claim 3 wherein said center-to-center spacing is about 1 to 2 micrometers.
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) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |