Patent US3220834A successfully refreshed from Google Patents.
US3220834A
Expired / Lapsed
US
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Process for storage and retrieval of information
Assignee: EIDP Inc
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Filing: 1962-06-20
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Granted: 1965-11-30
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Expires: 1982-06-20
Abstract
No abstract record available.
Inventors
- 👤 Richard M Scribner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:54
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/4989; G03C1/005; G03C1/06; G03C5/00; G03C5/26; G03C5/40; Y; Y10; Y10S; Y10S430/00; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
PROCESS FOR THE STORAGE AND RETRIEVAL OF INFORMATION WHICH COMPRISES: (A) EXPOSING IMAGEWISE TO MODULATED ENERGY READ-IN MEANS SELECTED FROM THE GROUP CONSISTING OF VISIBLE LIGHT, ULTRAVIOLET, X-RAY, AND INFRARED RADIATION, A RECORDING MEMBER COMPRISING A BASE LAYER AND A COATING OF A SALT CHARGE-TRANSFER COMPOUND, SAID SALT CHARGE-TRANSFER COMPOUND CONSISTING OF A CATION SELECTED FROM THE CLASS CONSISTING OF SILVER, AMMONIA, AND AMINES, AND THE ANION IS SELECTED FROM THE CLASS CONSISTING OF 7,7,8,8-TETRACYANQUINODIMETHANIDE AND RING-SUBSTITUTED LOWER ALKYL DERIVATIVES THEREOF; AND (B) RETRIEVING THE SENSIBLE INFORMATION STORED IN THE COATING BY IMAGE SENSING MEANS SELECTED FROM THE GROUP CONSISTING OF PARAMAGNETIC SENSING MEANS AND COMBINED OPTICAL AND PARAMAGNETIC SENSING MEANS.
References Cited (Backward Citations)
US2819963A
Cited
US2881073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |