US3417240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of testing transparent materials
Assignee: Aerojet Rocketdyne Inc
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Filing: 1964-08-20
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Granted: 1968-12-17
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Expires: 1984-08-20
Abstract
No abstract record available.
Inventors
- 👤 Irvin E Lamb
- 👤 Randall W Harman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/22; G01N2223/00; G01N2223/07; G01N2223/10; G01N2223/1006; G01N2223/101; G01N2223/1013; G01N2223/1016; G01N2223/60; G01N2223/646; G01N2223/6462
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A NON-DESTRUCTIVE METHOD OF EXAMINING TRANSPARENT MATERIAL FOR IMPERFECTIONS, COMPRISING SUBJECTING THE TRANSPARENT MATERIAL TO PENETRATING IONIZING RADIATION SO AS TO FILL ANY LATTICE IMPERFECTIONS IN THE TRANSPARENT MATERIAL WITH TRAPPED ELECTRONS, EXPOSING THE TRANSPARENT MATERIAL TO AN ELECTRONEXCITATION SOURCE CAPABLE OF EXCITING ANY ELECTRONS TRAPPED IN LATTICE IMPERFECTIONS THEREIN SO AS TO CAUSE LIGHT PHOTONS TO BE EMITTED FROM SUCH ELECTRONS, AND DETERMINING ANY AREAS OF LATTICE IMPERFECTIONS IN THE TRANSPARENT MATERIAL BY DETECTING ANY LIGHT PHOTONS EMITTED BY ELECTRONS EXCITED BY THE ELECTRON-EXCITATION SOURCE TO WHICH THE TRANSPARENT MATERIAL IS EXPOSED.
Claim 2
Dependent Claim
93 words
A NON-DESTRUCTIVE METHOD OF EXAMINING TRANSPARENT MATERIAL FOR IMPERFECTIONS, COMPRISING SUBJECTING THE TRANSPARENT MATERIAL TO PENETRATING IONIZING RADIATION SO AS TO FILL ANY LATTICE IMPERFECTIONS IN THE TRANSPARENT MATERIAL WITH TRAPPED ELECTRONS, EXPOSING THE TRANSPARENT MATERIAL TO AN ELECTRONEXCITATION SOURCE CAPABLE OF EXCITING ANY ELECTRONS TRAPPED IN LATTICE IMPERFECTIONS THEREIN SO AS TO CAUSE LIGHT PHOTONS TO BE EMITTED FROM SUCH ELECTRONS, AND DETERMINING ANY AREAS OF LATTICE IMPERFECTIONS IN THE TRANSPARENT MATERIAL BY DETECTING ANY LIGHT PHOTONS EMITTED BY ELECTRONS EXCITED BY THE ELECTRON-EXCITATION SOURCE TO WHICH THE TRANSPARENT MATERIAL IS EXPOSED.
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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |