Patent US4943720A successfully refreshed from Google Patents.
US4943720A
Expired / Lapsed
US
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Electronic probe
Assignee: Individual
•
Filing: 1989-08-02
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Granted: 1990-07-24
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Expires: 2009-08-02
Abstract
Abstract An electronic probe consists of a steel elongate base (10) having a conical tip (12) and a thin layer (14) of semi-conducting diamond of the tip (12). The diamond tip (16), viewed end-on, will generally have a radius of less than 3000 angstroms.
Inventors
- 👤 Barbara L. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:54
CPC Classifications
G; G01; G01Q; G01Q60/00; G01Q60/10; G01Q60/16; B; B82; B82Y; B82Y35/00; G01R; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/06711; Y; Y10; Y10S; Y10S977/00; Y10S977/84; Y10S977/849; Y10S977/86; Y10S977/875; Y10S977/879
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
25 words
An electronic probe comprising an electrically conductive base and a fine pointed tip, made of a semi-conducting diamond material, in electrical contact with the base.
Claim 2
Dependent Claim
25 words
An electronic probe comprising an electrically conductive base and a fine pointed tip, made of a semi-conducting diamond material, in electrical contact with the base.
Claim 3
Dependent Claim
29 words
A probe according to claim 1 wherein the base is an elongate object having a pointed end and the diamond material forms a thin layer on the pointed end.
Claim 4
Dependent Claim
18 words
A probe according to claim 2 wherein the thin layer has a thickness of less than 5 microns.
Claim 5
Dependent Claim
20 words
A probe according to claim 1 wherein the tip has a radius, viewed end on, of less than 3000 angstroms.
Claim 6
Dependent Claim
13 words
A probe according to claim 1 wherein the diamond material is crystalline diamond.
Claim 7
Dependent Claim
14 words
A probe according to claim 1 wherein the semi-conducting diamond material is boron-doped diamond.
Claim 8
Dependent Claim
13 words
A probe according to claim 1 wherein the base is made of steel.
Claim 9
Dependent Claim
14 words
A probe according to claim 1 wherein the base is made of boron-doped silicon.
References Cited (Backward Citations)
US4873115A
Cited
US4668865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |