Patent US3202912A successfully refreshed from Google Patents.
US3202912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of utilizing tunnel diodes to detect changes in magnetic fields
Assignee: AT&T Inc
•
Filing: 1960-05-05
•
Granted: 1965-08-24
•
Expires: 1980-05-05
Abstract
No abstract record available.
Inventors
- 👤 Alan G Chynoweth
- 👤 Ralph A Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:42
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2908871A
Cited
US2914728A
Cited
US2944167A
Cited
US2916639A
Cited
US3090014A
Cited
US3093755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |