US3308451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web record members
Assignee: International Business Machines Corp
•
Filing: 1963-12-19
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Granted: 1967-03-07
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Expires: 1983-12-19
Abstract
No abstract record available.
Inventors
- 👤 Charles L Blackley
- 👤 Herbert E Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:22
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN IMPROVED RECORD MEMBER FOR A RANDOM ACCESS MEMORY, SAID MEMBER COMPRISING A WEB HAVING A SUBSTRATE AND A RECORDING LAYER DISPOSED ON AND ADHERING TO ONE SURFACE OF SAID SUBSTRATE, SAID SUBSTRATE HAVING A RELIEVED PROFILE OF DIMINISHING CROSS-SECTIONAL AREA ON THE SURFACE OPPOSITE THAT CARRYING SAID RECORD COATING IN THE SIDE EDGES, WHEREBY THE VOLUME OF SAID SUBSTRATE IN THAT AREA IS REDUCED SUFFICIENTLY TO REDUCE COMPRESSIVE STRESS IN SAID SUBSTRATE AND SUBSTANTIALLY ELIMINATE ANTICLASTIC CURVATURE OF SAID WEB DURING MOVEMENT OF THE WEB IN A SELECTED CURVILINEAR PATH.
Claim 2
Dependent Claim
91 words
AN IMPROVED RECORD MEMBER FOR A RANDOM ACCESS MEMORY, SAID MEMBER COMPRISING A WEB HAVING A SUBSTRATE AND A RECORDING LAYER DISPOSED ON AND ADHERING TO ONE SURFACE OF SAID SUBSTRATE, SAID SUBSTRATE HAVING A RELIEVED PROFILE OF DIMINISHING CROSS-SECTIONAL AREA ON THE SURFACE OPPOSITE THAT CARRYING SAID RECORD COATING IN THE SIDE EDGES, WHEREBY THE VOLUME OF SAID SUBSTRATE IN THAT AREA IS REDUCED SUFFICIENTLY TO REDUCE COMPRESSIVE STRESS IN SAID SUBSTRATE AND SUBSTANTIALLY ELIMINATE ANTICLASTIC CURVATURE OF SAID WEB DURING MOVEMENT OF THE WEB IN A SELECTED CURVILINEAR PATH.
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) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |