US3501344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording tape supported on poly(ethylene 2,6 - naphthalenedicarboxylate)
Assignee: Eastman Kodak Co
•
Filing: 1967-07-28
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Granted: 1970-03-17
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Expires: 1987-07-28
Abstract
No abstract record available.
Inventors
- 👤 Marshall T Watson
- 👤 William D Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:31
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/73; G11B5/739; G11B5/73923; G11B5/73927; G11B5/73929; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3397072A
Cited
US2975484A
Cited
US3161710A
Cited
US3423370A
Cited
US3284223A
Cited
US3432591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |