US3535104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic particles containing chromium
Assignee: EIDP Inc
•
Filing: 1969-05-23
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Granted: 1970-10-20
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Expires: 1989-05-23
Abstract
No abstract record available.
Inventors
- 👤 Ernest Lewis Little Jr
- 👤 Jack D Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:31
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/24; C; C22; C22C; C22C38/00; C22C38/18; C22C38/32; C22C38/40; C22C38/52; G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70605; G11B5/70615; H01F1/065; H01F1/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3206338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |