US3404997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording media
Assignee: Ampex Corp
•
Filing: 1965-05-10
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Granted: 1968-10-08
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Morton J Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:12
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/71; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/06; C09D129/00; C09D129/02; C09D129/04; G11B5/702; G11B5/7023; C08L61/00; C08L61/20; C08L61/22; C08L61/24; C08L61/32; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2433062A
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US2914480A
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US2860801A
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US3024216A
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US3216846A
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US3320090A
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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) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |