US3187335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording by means of a thermal transducer
Assignee: Ex-Cell-O Corp
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Filing: 1961-12-20
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Granted: 1965-06-01
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Expires: 1981-12-20
Abstract
No abstract record available.
Inventors
- 👤 Iii Louis E Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:54
CPC Classifications
H; H10; H10N; H10N10/00; G; G11; G11B; G11B5/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
IN COMBINATION: A THERMOELECTRIC PELTIER JUNCTION CAPABLE OF BECOMING HEATED DURING THE PERIOD OF TIME THAT AN ELECTROMOTIVE FORCE IS APPLIED TO SAID JUNCTION TO CAUSE A CURRENT TO FLOW THEREACROSS IN ONE DIRECTION AND CAPABLE OF BEING COOLED AS SOON AS THE CURRENT REVERSES ITSELF, SAID JUNCTION TAPERING TO A NARROW GAP; A RECORD MEDIUM HAVING A MAGNETIC SURFACE THEREON WHICH HAS BEEN PREMAGNETIZED TO A PREDETERMINED LEVEL, SAID RECORD MEDIUM BEING TRANSLATED IN RELATION TO SAID JUNCTION IN CONTACT WITH SAID GAP; WHEREBY SOME PORTIONS OF SAID SURFACE ARE SELECTIVELY DEMAGNETIZED BY HEATING ABOVE THE
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) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |