US3253497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information storage device
Assignee: Polacoat Inc
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Filing: 1961-10-30
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Granted: 1966-05-31
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Expires: 1981-10-30
Abstract
No abstract record available.
Inventors
- 👤 John F Dreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:24
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7416; H04N5/7425; G; G11; G11C; G11C13/00; G11C13/04; G11C13/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
A SYSTEM FOR THE DESPOSIT, STORAGE, AND RETRIEVAL OF INFORMATION COMPRISING STORAGE MEANS COMPRISING A TENEBRESCENT SUBSTANCE CAPABLE OF EXHIBITING AN UNEXCITED STATE HAVING A FIRST CHARACTERISTIC ABSORPTION SPECTRUM ASSOCIATED THEREWITH AND AN EXCITED STATE HAVING A SECOND, DIFFERENT, CHARACTERISTIC ABSORPTION SPECTRUM ASSOCIATED THEREWITH, WRITING MEANS COMPRISING A FIRST MODULATED WRITING BEAM OF RADIATION, ADAPTED TO PLAY ON SAID STORAGE MEANS AND SELECTIVELY EXCITING UNEXCITED TENEBRESCENT SUBSTANCE AND THEREBY CHANGING ITS CHARACTERISTIC ABSORPTION SPECTRUM, ERASING MEANS COMPRISING A SECOND MODULATED ERASING BEAM OF DE-EXCITING RADIATION, ADAPTED TO PLAY ON SAID STORAGE MEANS AND SELECTIVELY DE-EXCITING EXCITED TENEBRESCENT SUBSTANCE AND THEREBY CHANGING ITS CHARACTERISTIC ABSORPTION SPECTRUM, AND READING MEANS COMPRISING A THIRD ILLUMINATING BEAM OF RADIATION, ADAPTED TO PLAY ON SAID STORAGE MEANS AND NEUTRAL WITH RESPECT TO EXCITATION AND DEEXCITATION OF THE TENEBRESCENT SUBSTANCE, SAID ILLUMINATING BEAM BEING DIFFERENTLY ABSORBED BY THE EXCITED AND UNEXCITED TENEBRESCENT SUBSTANCE IN SAID STORAGE MEANS AND EXCLUDING RADIATION CONTAINING AND IMMEDIATELY SURROUNDING A WAVELENGTH OF PEAK ABSORPTION OF SAID EXCITED TENEBRESCENT SUBSTANCE, AND MEANS FOR DETECTING THESE DIFFERENCES IN ABSORPTION OF THE ILLUMINATING BEAM.
Claim 2
Independent Claim
180 words
A SYSTEM FOR THE DESPOSIT, STORAGE, AND RETRIEVAL OF INFORMATION COMPRISING STORAGE MEANS COMPRISING A TENEBRESCENT SUBSTANCE CAPABLE OF EXHIBITING AN UNEXCITED STATE HAVING A FIRST CHARACTERISTIC ABSORPTION SPECTRUM ASSOCIATED THEREWITH AND AN EXCITED STATE HAVING A SECOND, DIFFERENT, CHARACTERISTIC ABSORPTION SPECTRUM ASSOCIATED THEREWITH, WRITING MEANS COMPRISING A FIRST MODULATED WRITING BEAM OF RADIATION, ADAPTED TO PLAY ON SAID STORAGE MEANS AND SELECTIVELY EXCITING UNEXCITED TENEBRESCENT SUBSTANCE AND THEREBY CHANGING ITS CHARACTERISTIC ABSORPTION SPECTRUM, ERASING MEANS COMPRISING A SECOND MODULATED ERASING BEAM OF DE-EXCITING RADIATION, ADAPTED TO PLAY ON SAID STORAGE MEANS AND SELECTIVELY DE-EXCITING EXCITED TENEBRESCENT SUBSTANCE AND THEREBY CHANGING ITS CHARACTERISTIC ABSORPTION SPECTRUM, AND READING MEANS COMPRISING A THIRD ILLUMINATING BEAM OF RADIATION, ADAPTED TO PLAY ON SAID STORAGE MEANS AND NEUTRAL WITH RESPECT TO EXCITATION AND DEEXCITATION OF THE TENEBRESCENT SUBSTANCE, SAID ILLUMINATING BEAM BEING DIFFERENTLY ABSORBED BY THE EXCITED AND UNEXCITED TENEBRESCENT SUBSTANCE IN SAID STORAGE MEANS AND EXCLUDING RADIATION CONTAINING AND IMMEDIATELY SURROUNDING A WAVELENGTH OF PEAK ABSORPTION OF SAID EXCITED TENEBRESCENT SUBSTANCE, AND MEANS FOR DETECTING THESE DIFFERENCES IN ABSORPTION OF THE ILLUMINATING BEAM.
References Cited (Backward Citations)
US2563472A
Cited
US2432908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |