Patent US3342591A successfully refreshed from Google Patents.
US3342591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic compounds and method of preparation
Assignee: International Business Machines Corp
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Filing: 1964-08-31
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Granted: 1967-09-19
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Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Richard J Gambino
- 👤 Holtzberg Frederic
- 👤 Siegfried J Methfessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:23
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/40; C; C22; C22C; C22C1/00; C22C1/02; C22C1/04; C22C1/047; C22C28/00; H01F1/03; H01F1/0302; H01F1/0306; H01F1/032; H01F1/04; H01F1/047; H01F1/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A RARE EARTH COMPOUND SELECTED FROM THE GROUP CONSISTING OF GD2BI, GD2SB AND DY2SB.
Claim 2
Dependent Claim
14 words
A RARE EARTH COMPOUND SELECTED FROM THE GROUP CONSISTING OF GD2BI, GD2SB AND DY2SB.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |