Patent US5839077A successfully refreshed from Google Patents.
US3144601A
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Method of discovering and locating the position of localized electrically non-conducting defects in non-conducting materials
Assignee: Compagnie de Saint Gobain SA
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Filing: 1958-01-14
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Granted: 1964-08-11
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Expires: 1978-01-14
Abstract
No abstract record available.
Inventors
- 👤 Slabodsky Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:17
CPC Classifications
G; G01; G01N; G01N22/00; G01N22/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A METHOD OF SEARCHING FOR AND DISCOVERING THE POSITION AND THE DIMENSION OF LOCALIZED ELECTRICALLY NONCONDUCTING DEFECTS IN THE SURFACE AND THE INTERIOR OF A SHEET OF ELECTRICALLY NON-CONDUCTING MATERIAL, SAID DEFECTS HAVING DIMENSIONS ON THE ORDER OF THE RANGE 1 MM. TO 1/10 MM., COMPRISING DIRECTING UPON AND SCANNING SUCH SHEET OF MATERIAL WITH A MOVING BEAM OF ELECTROMAGNETIC WAVES, HAVING A WAVE LENGTH ON THE ORDER OF THE
Claim 2
Independent Claim
70 words
A METHOD OF SEARCHING FOR AND DISCOVERING THE POSITION AND THE DIMENSION OF LOCALIZED ELECTRICALLY NONCONDUCTING DEFECTS IN THE SURFACE AND THE INTERIOR OF A SHEET OF ELECTRICALLY NON-CONDUCTING MATERIAL, SAID DEFECTS HAVING DIMENSIONS ON THE ORDER OF THE RANGE 1 MM. TO 1/10 MM., COMPRISING DIRECTING UPON AND SCANNING SUCH SHEET OF MATERIAL WITH A MOVING BEAM OF ELECTROMAGNETIC WAVES, HAVING A WAVE LENGTH ON THE ORDER OF THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |