US3455770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic index cards and method for producing same
Assignee: Individual
•
Filing: 1965-04-13
•
Granted: 1969-07-15
•
Expires: 1985-04-13
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Dahl Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:42
CPC Classifications
H; H04; H04L; H04L17/00; H04L17/16; H04L17/20; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T156/1057; Y10T156/1084; Y10T156/1089; Y10T156/1092; Y10T156/1097; Y10T156/1098; Y10T156/12; Y10T156/1317; Y10T156/1322; Y10T156/1343; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1722; Y10T156/1727; Y10T428/00; Y10T428/15
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
A LAMINOUS, MAGNETICALLY RESPONSIVE TABULATING CARD OF SUBSTANTIALLY UNIFORM THICKNESS COMPRISING: AN INTERMEDIATE WEB OF NON-MAGNETIC MATERIAL; APAIR OF OUTER SHEETS OF NON-MAGNETIC MATERIAL OF SUBSTANTIALLY THE SAME WIDTH SYMMETRICALLY DISPOSED ABOVE AND BELOW SAID INTERMEDAITE WEB IN LAMINATED RELATIONSHIP THEREWITH, SAID INTERMEDIATE WEB HAVING A RECESSED REGION DISPOSED BETWEEN SAID OUTER SHEETS DEFINING A SLOT IN SAID CARD; A MAGNETIZABLE STRIP SUBSTANTIALLY FILLING SAID SLOT IN SUBSTANTIALLY EDGE-TO-EDGE RELATIONSHIP WITH SAID INTERMEDIATE WEB, SAID STRIP HAVING A THICKNESS NOT SUBSTANTIALLY GREATER THAN THE THICKNESS OF SAID INTERMEDIATE WEB AND BEING SUBSTANTIALLY IN THE SAME PLANE THEREWITH; AND ADHESIVE BONDING MEANS BETWEEN SAID WEB, SAID SHEETS AND SAID STRIP FOR CONNECTING THE SAME INTO A UNITARY STRUCTURE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |