US3409774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determining the thickness of a coating on a metal base and method of calibrating the thickness gauge
Assignee: United States Steel Corp
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Filing: 1966-05-25
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Granted: 1968-11-05
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Expires: 1986-05-25
Abstract
No abstract record available.
Inventors
- 👤 Dykeman George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:00
CPC Classifications
G; G01; G01B; G01B15/00; G01B15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
THE METHOD OF CALIBRATING A GAUGE FOR DETERMINING THE THICKNESS OF A COATING ON A METAL BASE WHICH GAUGE HAS MEANS FOR DIRECTING A PRIMARY ENERGY BEAM AGAINST THE COATED METAL AND MEANS FOR MEASURING THE INTENSITY OF THE ENERGY BEAM PRODUCED AND RETURNED FROM SAID BASE METAL THROUGH SAID COATING; WHICH METHOD COMPRISES PROVIDING A SAMPLE OF THE BASE METAL HAVING A FLAT SURFACE, PROVIDING A PLURALITY OF SHEETS OF A MATERIAL HAVING ABSORPTION CHARACTERISTICS SIMILAR TO AND OF KNOWN RELATIONSHIP TO THOSE OF THE COATING MATERIAL BUT WHICH IS CONSIDERABLY LESS DENSE THAN THE COATING MATERIAL, PLACING KNOWN THICKNESSES OF SAID SHEETS OF MATERIAL ON SAID FLAT SURFACE, DIRECTING AN ENERGY BEAM OF FIXED AND KNOWN CHARACTERISTICS AGAINST SAID FLAT SURFACE, MEASURING FOR EACH KNOWN THICKNESS OF SAID MATERIAL THE INTENSITY OF THE RESULTANT ENERGY BEAM PRODUCED AND RETURNED FROM SAID
Claim 2
Independent Claim
143 words
THE METHOD OF CALIBRATING A GAUGE FOR DETERMINING THE THICKNESS OF A COATING ON A METAL BASE WHICH GAUGE HAS MEANS FOR DIRECTING A PRIMARY ENERGY BEAM AGAINST THE COATED METAL AND MEANS FOR MEASURING THE INTENSITY OF THE ENERGY BEAM PRODUCED AND RETURNED FROM SAID BASE METAL THROUGH SAID COATING; WHICH METHOD COMPRISES PROVIDING A SAMPLE OF THE BASE METAL HAVING A FLAT SURFACE, PROVIDING A PLURALITY OF SHEETS OF A MATERIAL HAVING ABSORPTION CHARACTERISTICS SIMILAR TO AND OF KNOWN RELATIONSHIP TO THOSE OF THE COATING MATERIAL BUT WHICH IS CONSIDERABLY LESS DENSE THAN THE COATING MATERIAL, PLACING KNOWN THICKNESSES OF SAID SHEETS OF MATERIAL ON SAID FLAT SURFACE, DIRECTING AN ENERGY BEAM OF FIXED AND KNOWN CHARACTERISTICS AGAINST SAID FLAT SURFACE, MEASURING FOR EACH KNOWN THICKNESS OF SAID MATERIAL THE INTENSITY OF THE RESULTANT ENERGY BEAM PRODUCED AND RETURNED FROM SAID
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |