Patent US4417170A successfully refreshed from Google Patents.
Patent US3124803A successfully refreshed from Google Patents.
US3124803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
homan
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:40
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/23; G11B5/147
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
A MAGNETIC TRANSDUCER COMPRISING A RING STRUCTURE HAVING AN AIR GAP OFFSET FROM THE PLANE OF THE RING AND A COIL SPACED FROM THE AIR GAP, THE OVERALL HEIGHT OF THE TRANSDUCER BEING ONLY A FRACTION OF THE DIAMETER OF THE RING STRUCTURE, SAID RING BEING FORMED OF A PLURALITY OF SHEET METAL STRIPS ARRANGED IN PARTIAL OVERLAPPING RELATION, EACH STRIP HAVING A LATERALLY EXTENDING TAB ADJACENT ONE END, THE TABS OF ADJACENT STRIPS BEING ALIGNED IN OVER-
References Cited (Backward Citations)
US2806904A
Cited
US2850582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |