Patent US3047428A successfully refreshed from Google Patents.
US3047428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording material
Assignee: Fujifilm Holdings Corp
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Filing: 1959-01-26
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Granted: 1962-07-31
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Goto Hiroshi
- 👤 Akashi Goro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:06
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70642; G11B5/70652; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T428/00; Y10T428/26; Y10T428/268
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A MAGNETIC SOUND RECORD COMPRISING NON-MAGNETIC CARRIER, A LACQUER COATING ON SAID CARRIER AND PARTICLES OF GAMA FERRIC OXIDE IN THE FORM OF THIN FLAT PLATES IN SAID COATING SAID THIN FLAT PLATES HAVING A THICKNESS WHICH IS ABOUT ONE -TENTH OF THE LENGHT THE LENGHT AND THE WIDTH OF THE THIN FLAT PLATES BEING SUBSTANTIALLY EQUAL, SAID THIN FLAT PLATES BEING ORIENTED IN THE COATING IN A MENNER SO THAT THE FLAT PLATES ARE SUBSTANTIALLY PARALLEL TO THE CARRIER.
Claim 2
Dependent Claim
80 words
A MAGNETIC SOUND RECORD COMPRISING NON-MAGNETIC CARRIER, A LACQUER COATING ON SAID CARRIER AND PARTICLES OF GAMA FERRIC OXIDE IN THE FORM OF THIN FLAT PLATES IN SAID COATING SAID THIN FLAT PLATES HAVING A THICKNESS WHICH IS ABOUT ONE -TENTH OF THE LENGHT THE LENGHT AND THE WIDTH OF THE THIN FLAT PLATES BEING SUBSTANTIALLY EQUAL, SAID THIN FLAT PLATES BEING ORIENTED IN THE COATING IN A MENNER SO THAT THE FLAT PLATES ARE SUBSTANTIALLY PARALLEL TO THE CARRIER.
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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |