US3397072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording tape with an asymmetrically oriented terephthalate polymer support
Assignee: EIDP Inc
•
Filing: 1959-08-28
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Granted: 1968-08-13
•
Expires: 1979-08-28
Abstract
No abstract record available.
Inventors
- 👤 Alles Francis Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:41
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/73; G11B5/739; G11B5/73923; G11B5/73927; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
MAGNETIC RECORDING TAPE COMPRISING A THIN LAYER OF A MAGNETICALLY SUSCEPTIBLE MATERIAL DISPERSED IN A BINDER COATED ON A FLEXIBLE SUPPORT, SAID SUPPORT COMPRISING A POLYMERIC LINEAR TEREPHTHALATE ESTER FILM WHICH HAS BEEN ORIENTED TO A GREATER EXTENT IN THE LONGITUDINAL DIRECTION THAN IN THE TRANSVERSE DIRECTION BY STRETCHING FROM 3.4X TO 5.0X IN THE LONGITUDINAL DIRECTION AND FROM 1.2X TO 3.0X IN THE TRANSVERSE DIRECTION.
Claim 2
Dependent Claim
66 words
MAGNETIC RECORDING TAPE COMPRISING A THIN LAYER OF A MAGNETICALLY SUSCEPTIBLE MATERIAL DISPERSED IN A BINDER COATED ON A FLEXIBLE SUPPORT, SAID SUPPORT COMPRISING A POLYMERIC LINEAR TEREPHTHALATE ESTER FILM WHICH HAS BEEN ORIENTED TO A GREATER EXTENT IN THE LONGITUDINAL DIRECTION THAN IN THE TRANSVERSE DIRECTION BY STRETCHING FROM 3.4X TO 5.0X IN THE LONGITUDINAL DIRECTION AND FROM 1.2X TO 3.0X IN THE TRANSVERSE DIRECTION.
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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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |