US3392400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for recording digital information
Assignee: Eastman Kodak Co
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Filing: 1966-12-14
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Granted: 1968-07-09
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Expires: 1986-12-14
Abstract
No abstract record available.
Inventors
- 👤 Robert L Lamberts
- 👤 George C Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:22
CPC Classifications
G; G11; G11C; G11C17/00; G11C17/005; G11C13/00; G11C13/04; G11C13/042; G11C13/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE METHOD OF STORING DIGITAL DATA COMPRISING A SERIES OF DISCRETE NUMERICAL DIGITS, SAID METHOD COMPRISING RECORDING IN A DISCRETE AREA OF A RECORD MEMBER A DIFFRACTION GRATING HAVING A GIVEN SPATIAL FREQUENCY CORRESPONDING TO AND UNIQUELY INDICATIVE OF A FIRST DIGIT OF SAID SERIES, AND RECORDING IN THE SAME DISCRETE AREA OF SAID RECORD MEMBER IN SUBSTANTIALLY SUPERIMPOSED RELATION WITH SAID GRATING, A FURTHER DIFFRACTION GRATING FOR EACH OTHER DIGIT OF SAID SERIES, EACH SUCH FURTHER GRATING BEING OF A SPATIAL FREQUENCY UNIQUELY INDICATIVE OF ITS CORRESPONDING DIGIT.
Claim 2
Independent Claim
89 words
THE METHOD OF STORING DIGITAL DATA COMPRISING A SERIES OF DISCRETE NUMERICAL DIGITS, SAID METHOD COMPRISING RECORDING IN A DISCRETE AREA OF A RECORD MEMBER A DIFFRACTION GRATING HAVING A GIVEN SPATIAL FREQUENCY CORRESPONDING TO AND UNIQUELY INDICATIVE OF A FIRST DIGIT OF SAID SERIES, AND RECORDING IN THE SAME DISCRETE AREA OF SAID RECORD MEMBER IN SUBSTANTIALLY SUPERIMPOSED RELATION WITH SAID GRATING, A FURTHER DIFFRACTION GRATING FOR EACH OTHER DIGIT OF SAID SERIES, EACH SUCH FURTHER GRATING BEING OF A SPATIAL FREQUENCY UNIQUELY INDICATIVE OF ITS CORRESPONDING DIGIT.
References Cited (Backward Citations)
US2813146A
Cited
US3314052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |