US3130933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape apparatus
Assignee: Ampex Corp
•
Filing: 1960-12-15
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Granted: 1964-04-28
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Expires: 1980-12-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert F Pillsbury
- 👤 Nelson C Yew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:54
CPC Classifications
G; G11; G11B; G11B15/00; Y; Y10; Y10S; Y10S242/00; Y10S242/90; Y10S242/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A MAGNETIC TAPE APPARATUS FOR MOVING A MAGNETIC TAPE PAST A TRANSDUCING MEANS, SAID TAPE HAVING A MAGNETIC OXIDE LAYER ON ONE SURFACE THEREOF COMPRISING: MEANS FOR SUPPLYING SAID TAPE TO SAID TRANSDUCING MEANS; MEANS FOR TAKEUP OF SAID TAPE AFTER SAID TAPE HAS TRAVERSED SAID TRANSDUCING MEANS; A BAR OF TEFLON; MEANS FOR CAUSING FRICTIONAL ENGAGEMENT OF SAID BAR WITH SAID OXIDE LAYER, SAID LAST-NAMED MEANS COMPRISING RESILIENT MEANS DISPOSED ADJACENT TO SAID OXIDE LAYER SURFACE FOR URGING SAID BAR OF TEFLON AGAINST SAID COSTS LAYER AND A FIXED TAPE GUIDE FOR ENGAGING THE OPPOSITE SURFACE OF SAID TAPE.
Claim 2
Dependent Claim
100 words
A MAGNETIC TAPE APPARATUS FOR MOVING A MAGNETIC TAPE PAST A TRANSDUCING MEANS, SAID TAPE HAVING A MAGNETIC OXIDE LAYER ON ONE SURFACE THEREOF COMPRISING: MEANS FOR SUPPLYING SAID TAPE TO SAID TRANSDUCING MEANS; MEANS FOR TAKEUP OF SAID TAPE AFTER SAID TAPE HAS TRAVERSED SAID TRANSDUCING MEANS; A BAR OF TEFLON; MEANS FOR CAUSING FRICTIONAL ENGAGEMENT OF SAID BAR WITH SAID OXIDE LAYER, SAID LAST-NAMED MEANS COMPRISING RESILIENT MEANS DISPOSED ADJACENT TO SAID OXIDE LAYER SURFACE FOR URGING SAID BAR OF TEFLON AGAINST SAID COSTS LAYER AND A FIXED TAPE GUIDE FOR ENGAGING THE OPPOSITE SURFACE OF SAID TAPE.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |