US2955085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrites of decreased initial permeability at high frequencies
Assignee: US Philips Corp
•
Filing: 1956-08-09
•
Granted: 1960-10-04
•
Expires: 1976-08-09
Abstract
No abstract record available.
Inventors
- 👤 Jonker Gerard Heinrich
- 👤 Wijn Henricus Petrus Johannes
- 👤 Braun Poul Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:14
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2641; C04B35/2608; C04B35/2616; C04B35/2625; C04B35/2633; C04B35/2683
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A FERROMAGNETIC MATERIAL CONSISTING ESSENTIALLY OF CRYSTALS HAVING A COMPOSITION
Claim 2
Dependent Claim
10 words
A FERROMAGNETIC MATERIAL CONSISTING ESSENTIALLY OF CRYSTALS HAVING A COMPOSITION
References Cited (Backward Citations)
US2659698A
Cited
US2762777A
Cited
US2736708A
Cited
US2762778A
Cited
US2723239A
Cited
US2778803A
Cited
DE927259C
Cited
FR1100865A
Cited
US2828264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |