US4158890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency selective optical data storage system
Assignee: International Business Machines Corp
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Filing: 1977-12-12
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Granted: 1979-06-19
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Expires: 1997-12-12
Abstract
Abstract An optical data storage system that utilizes the frequency dimension to increase the storage capacity. The storage system has a storage material which contains a guest material such as cinnoline, which is dissolved in a host material such as naphthalene. This storage material system exhibits an inhomogeneous absorption line broadening and undergoes a photochemical reaction upon exposure to light.
Inventors
- 👤 Donald M. Burland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A frequency selective optical data storage system having a laser that can write non-volatile information on an organic storage material, said storage material comprising: a solid host material of naphthalene; and cinnoline dissolved in said host material to provide a concentration therein of between 10 -2 wt % and 10 -6 wt % wherein said cinnoline upon exposure to light from said laser undergoes an irreversible photo-induced reaction resulting information stored in the non-volatile ground state of said cinnoline in the frequency dimension.
Claim 2
Dependent Claim
83 words
A frequency selective optical data storage system having a laser that can write non-volatile information on an organic storage material, said storage material comprising: a solid host material of naphthalene; and cinnoline dissolved in said host material to provide a concentration therein of between 10 -2 wt % and 10 -6 wt % wherein said cinnoline upon exposure to light from said laser undergoes an irreversible photo-induced reaction resulting information stored in the non-volatile ground state of said cinnoline in the frequency dimension.
References Cited (Backward Citations)
US3296594A
Cited
US3568167A
Cited
US3508208A
Cited
US3683336A
Cited
US4041476A
Cited
US3896420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |