US3291740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrimagnetic garnet compositions
Assignee: AT&T Inc
•
Filing: 1963-11-29
•
Granted: 1966-12-13
•
Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Gerald P Espinosa
- 👤 Geller Seymour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2683; C04B35/2641
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A SYNTHETIC GARNET COMPOSITION HAVING THE FORMULA:
Claim 2
Dependent Claim
7 words
A SYNTHETIC GARNET COMPOSITION HAVING THE FORMULA:
References Cited (Backward Citations)
US2837483A
Cited
US3003966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |