US3387995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of magnetic recording media using copolyamide bender for ferromagnetic powder
Assignee: BASF SE
•
Filing: 1964-03-17
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Granted: 1968-06-11
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Expires: 1984-03-17
Abstract
No abstract record available.
Inventors
- 👤 Senkpiel Werner
- 👤 Dachs Karl
- 👤 Wilhelm Hans
- 👤 Wagner Herbert
- 👤 Becht Guenter
- 👤 Werst Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/702; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31736; Y10T428/31765; Y10T428/31786
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA669064A
Cited
US2071250A
Cited
US2937028A
Cited
US2941901A
Cited
US2991198A
Cited
US3247017A
Cited
US3139354A
Cited
US3284360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |