US3149996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic record member
Assignee: BASF SE
•
Filing: 1961-11-14
•
Granted: 1964-09-22
•
Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Wagner Herbert
- 👤 Merkel Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:44
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; G11B5/7023; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A MAGNETIC RECORED MEMBER COMPRISING A PLASTIC CARRIER TAPE AND AT LEAST ONE LAYER APPLIED THERETO CONTAINING A MAGNETIZABLE SUBSTANCE INCORPORATED IN A BINDER, WHEREIN AT LEAST IN THE UPPERMOST LAYER THE BINDER IS A COPOLYMER OF 60 TO 90% BY WEIGHT OF STYRENE AND 40 TO 10% BY WEIGHT OF ACRYLONITRILE, THE RATIO BETWEEN SAID BINDER AND SAID MAGNETIZABLE SUBSTANCE BEING FROM 1:2 TO 1:7.
Claim 2
Dependent Claim
66 words
A MAGNETIC RECORED MEMBER COMPRISING A PLASTIC CARRIER TAPE AND AT LEAST ONE LAYER APPLIED THERETO CONTAINING A MAGNETIZABLE SUBSTANCE INCORPORATED IN A BINDER, WHEREIN AT LEAST IN THE UPPERMOST LAYER THE BINDER IS A COPOLYMER OF 60 TO 90% BY WEIGHT OF STYRENE AND 40 TO 10% BY WEIGHT OF ACRYLONITRILE, THE RATIO BETWEEN SAID BINDER AND SAID MAGNETIZABLE SUBSTANCE BEING FROM 1:2 TO 1:7.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |