US3117935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferromagnetic material
Assignee: US Philips Corp
•
Filing: 1961-06-06
•
Granted: 1964-01-14
•
Expires: 1981-06-06
Abstract
No abstract record available.
Inventors
- 👤 Braun Poul Bernard
- 👤 Kwestroo Wim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:06
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2641
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A FERROMAGNETIC MATERIAL CONSISTING ESSENTIALLY OF MIXED CRYSTALS OF COMPOUNDS HAVING A CHEMICAL COMPOSITION ACCORDING TO THE FORMULA
Claim 2
Dependent Claim
18 words
A FERROMAGNETIC MATERIAL CONSISTING ESSENTIALLY OF MIXED CRYSTALS OF COMPOUNDS HAVING A CHEMICAL COMPOSITION ACCORDING TO THE FORMULA
References Cited (Backward Citations)
US1946964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |