US3149407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing a hall effect readout device
Assignee: Ampex Corp
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Filing: 1962-12-03
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Granted: 1964-09-22
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 George H Stockton
- 👤 Nelson C Yew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:03
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/37; G11B5/376; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49048; Y10T29/49055; Y10T29/49069; Y10T29/49787; Y10T29/49826; Y10T29/49861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOD FOR MANUFACUTRING HALL EFFECT TRANDUCERS COMPRISING THE STEPS OF: LAPPING AND POLISHING A FIRST FERRITE SLAB; ATTACHING A HALL EFFECT PLATE TO A POLISHED SIDE OF SUCH FERRITE SLAB; LAPPING THE HALL EFFECT PLATE TO A DESIRED THICKNESS WHILE SUPPORTED BY THE FERRITE SLAB; JOINING A SECOND FERRITE SLAB TO THE OTHER SIDE OF SUCH HALL EFFECT PLATE TO FORM A SANDWICH ASSEMBLY; SEVERING THE SANDWICH ASSEMBLY INTO A MULTIPLICITY OF LIKE UNITS, EACH HAVING FERRITE BLOCKS ENCOMPASSING A HALL ELEMENT; APPLYING ELECTRICAL CONTACTS TO THE PERIPHERY OF THE HALL ELEMENT; AND ATTACHING ELECTRICAL LEADS TO SUCH CONTACTS.
Claim 2
Independent Claim
100 words
A METHOD FOR MANUFACUTRING HALL EFFECT TRANDUCERS COMPRISING THE STEPS OF: LAPPING AND POLISHING A FIRST FERRITE SLAB; ATTACHING A HALL EFFECT PLATE TO A POLISHED SIDE OF SUCH FERRITE SLAB; LAPPING THE HALL EFFECT PLATE TO A DESIRED THICKNESS WHILE SUPPORTED BY THE FERRITE SLAB; JOINING A SECOND FERRITE SLAB TO THE OTHER SIDE OF SUCH HALL EFFECT PLATE TO FORM A SANDWICH ASSEMBLY; SEVERING THE SANDWICH ASSEMBLY INTO A MULTIPLICITY OF LIKE UNITS, EACH HAVING FERRITE BLOCKS ENCOMPASSING A HALL ELEMENT; APPLYING ELECTRICAL CONTACTS TO THE PERIPHERY OF THE HALL ELEMENT; AND ATTACHING ELECTRICAL LEADS TO SUCH CONTACTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |