US2914728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hall effect probe
Assignee: International Business Machines Corp
•
Filing: 1956-10-02
•
Granted: 1959-11-24
•
Expires: 1976-10-02
Abstract
No abstract record available.
Inventors
- 👤 James J Brophy
- 👤 John W Buttrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:42
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/37; G01; G01R; G01R33/00; G01R33/02; G01R33/06; G01R33/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2825858A
Cited
US2508030A
Cited
US2562120A
Cited
US2607821A
Cited
US2707769A
Cited
US2760127A
Cited
US2814015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |