Patent US3274330A successfully refreshed from Google Patents.
Patent US3071757A successfully refreshed from Google Patents.
US3071757A
Expired / Lapsed
US
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Data storage apparatus
Assignee: RCA Corp
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Filing: 1957-12-02
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Granted: 1963-01-01
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Expires: 1977-12-02
Abstract
No abstract record available.
Inventors
- 👤 Martin L Levene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:12
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/74; G11B5/76; G11B5/48; G11B5/54; G11B5/55; G11B5/5591
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN A DATA STORAGE APPARATUS, THE COMBINATION OF FIRST AND SECOND MEMBERS ROTATABLY MOUNTED WITH RESPECT TO EACH OTHER, ONE OF SAID MEMBERS HAVING RETENTIVE MATERIAL ON ONE SURFACE THEREOF, AND THE OTHER OF SAID MEMBERS HAVING TRANSDUCING MEANS FOR COUPLING TO SAID MATERIAL, WITH MEANS INCLUDING FIRST AND SECOND PISTON CHAMBERS COOPERATING WITH SAID MEMBERS FOR APPLYING FORCES ALTERNATELY TO ONE AND THE OTHER OF SAID CHAMBERS FOR RECIPROCALLY OSCILLATING ONE OF SAID MEMBERS RELATIVE TO THE OTHER.
Claim 2
Dependent Claim
79 words
IN A DATA STORAGE APPARATUS, THE COMBINATION OF FIRST AND SECOND MEMBERS ROTATABLY MOUNTED WITH RESPECT TO EACH OTHER, ONE OF SAID MEMBERS HAVING RETENTIVE MATERIAL ON ONE SURFACE THEREOF, AND THE OTHER OF SAID MEMBERS HAVING TRANSDUCING MEANS FOR COUPLING TO SAID MATERIAL, WITH MEANS INCLUDING FIRST AND SECOND PISTON CHAMBERS COOPERATING WITH SAID MEMBERS FOR APPLYING FORCES ALTERNATELY TO ONE AND THE OTHER OF SAID CHAMBERS FOR RECIPROCALLY OSCILLATING ONE OF SAID MEMBERS RELATIVE TO THE OTHER.
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |