US3535245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal-oxide coated ferrimagnetic particles
Assignee: Chevron USA Inc
•
Filing: 1969-10-23
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Granted: 1970-10-20
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Expires: 1989-10-23
Abstract
No abstract record available.
Inventors
- 👤 Robert H Lindquist
- 👤 Bernard F Mulaskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:50
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70642; G11B5/70678; G11B5/84; H; H01; H01F; H01F1/00; H01F1/0009; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/08; H01F1/083; H01F1/10; H01F1/11; H01F1/112; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 0
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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) | 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 |