US3193679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron probe apparatus for counting the number of inclusions in a specimen
Assignee: TI Group Services Ltd
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Filing: 1963-04-24
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Granted: 1965-07-06
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Expires: 1983-04-24
Abstract
No abstract record available.
Inventors
- 👤 Melford David Austin
- 👤 Whittington Keith Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:54
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/22; G01N23/225; G01N23/20; G01N23/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
APPARATUS FOR COUNTING THE NUMBER OF INCLUSIONS IN THE SURFACE OF A SPECIMEN OF MATERIAL, SAID APPARATUS COMPRISING: ELECTRON-BEAM FORMING MEANS; MEANS FOR CAUSING SAID BEAM TO SCAN AN AREA OF THE SURFACE OF THE SPECIMENT BY CAUSING THE BEAM TO PASS SUCCESSIVELY OVER ADJACENT LINES OF THE AREA; MEANS FOR DETECTING THE BACKSCATTER OF ELECTRONS FROM SAID SURFACE AS THE BEAM SCANS THE SURFACE; MEANS FOR DERIVING A SIGNAL WHICH VARIES IN ACCORDANCE WITH THE CHANGES IN THE INTENSITY OF THE DETECTED BACK-SCATTER; MEANS FOR RECORDING SAID SIGNAL; MEANS FOR COMPARING THAT PART OF SAID SIGNAL RESULTING FROM EACH SCANNED LINE WITH THAT PART OF THE RECORDED SIGNAL RESULTING FROM THE PREVIOUSLY SCANNED LINE; MEANS FOR PRODUCING A RESPONSE WHEN SIGNIFICANT DIFFERENCES IN THE TWO SAID PARTS OF THE SIGNAL OCCUR; AND MEANS FOR COUNTING HALF THE NUMBER OF SUCH RESPONSES, THE NUMBER COUNTED THUS BEING EQUAL TO THE NUMBER OF INCLUSIONS.
Claim 2
Dependent Claim
153 words
APPARATUS FOR COUNTING THE NUMBER OF INCLUSIONS IN THE SURFACE OF A SPECIMEN OF MATERIAL, SAID APPARATUS COMPRISING: ELECTRON-BEAM FORMING MEANS; MEANS FOR CAUSING SAID BEAM TO SCAN AN AREA OF THE SURFACE OF THE SPECIMENT BY CAUSING THE BEAM TO PASS SUCCESSIVELY OVER ADJACENT LINES OF THE AREA; MEANS FOR DETECTING THE BACKSCATTER OF ELECTRONS FROM SAID SURFACE AS THE BEAM SCANS THE SURFACE; MEANS FOR DERIVING A SIGNAL WHICH VARIES IN ACCORDANCE WITH THE CHANGES IN THE INTENSITY OF THE DETECTED BACK-SCATTER; MEANS FOR RECORDING SAID SIGNAL; MEANS FOR COMPARING THAT PART OF SAID SIGNAL RESULTING FROM EACH SCANNED LINE WITH THAT PART OF THE RECORDED SIGNAL RESULTING FROM THE PREVIOUSLY SCANNED LINE; MEANS FOR PRODUCING A RESPONSE WHEN SIGNIFICANT DIFFERENCES IN THE TWO SAID PARTS OF THE SIGNAL OCCUR; AND MEANS FOR COUNTING HALF THE NUMBER OF SUCH RESPONSES, THE NUMBER COUNTED THUS BEING EQUAL TO THE NUMBER OF INCLUSIONS.
References Cited (Backward Citations)
US3103584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |