US3278841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave flaw detection system
Assignee: RTX Corp
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Filing: 1963-06-27
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Granted: 1966-10-11
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Expires: 1983-06-27
Abstract
No abstract record available.
Inventors
- 👤 Merlyn L Hanson
- 👤 Ziermann Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:30
CPC Classifications
G; G01; G01N; G01N22/00; G01N22/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A NONDESTRUCTIVE TESTING APPARATUS FOR DETERMINING THE PRESENCE AND LOCATION OF FLAWS IN A SOLID ROCKET PROPELLANT, SAID PROPELLANT HAVING A HOLLOW CORE ALONG ONE AXIS THEREOF AND A CASE OF REFLECTING MATERIAL COVERING AT LEAST A PORTION OF THE OUTSIDE PERIMETER OF SAID PROPELLANT, COMPRISING A TRANSMITTER LOCATED WITHIN SAID CORE FOR GENERATING A MICROWAVE BEAM, MEANS FOR DIRECTING SAID BEAM TOWARD A PORTION OF SAID PROPELLANT COVERED BY SAID CASE, SAID BEAM PASSING THROUGH A FIRST PORTION OF SAID PROPELLANT AND BEING REFLECTED BY SAID CASE WHEREBY SAID BEAM PASSES THROUGH A SECOND PORTION OF SAID PROPELLANT, A RECEIVER LOCATED WITHIN SAID CORE FOR RECEIVING SAID REFLECTED BEAM, AND INDICATOR MEANS CONNECTED WITH SAID RECEIVER AND RESPONSIVE TO VARIATIONS IN SAID MICROWAVE BEAM FOR PRODUCING AN OUTPUT INDICATIVE OF THE LOCATION OF ANOMALIES IN SAID PROPELLANT.
Claim 2
Dependent Claim
138 words
A NONDESTRUCTIVE TESTING APPARATUS FOR DETERMINING THE PRESENCE AND LOCATION OF FLAWS IN A SOLID ROCKET PROPELLANT, SAID PROPELLANT HAVING A HOLLOW CORE ALONG ONE AXIS THEREOF AND A CASE OF REFLECTING MATERIAL COVERING AT LEAST A PORTION OF THE OUTSIDE PERIMETER OF SAID PROPELLANT, COMPRISING A TRANSMITTER LOCATED WITHIN SAID CORE FOR GENERATING A MICROWAVE BEAM, MEANS FOR DIRECTING SAID BEAM TOWARD A PORTION OF SAID PROPELLANT COVERED BY SAID CASE, SAID BEAM PASSING THROUGH A FIRST PORTION OF SAID PROPELLANT AND BEING REFLECTED BY SAID CASE WHEREBY SAID BEAM PASSES THROUGH A SECOND PORTION OF SAID PROPELLANT, A RECEIVER LOCATED WITHIN SAID CORE FOR RECEIVING SAID REFLECTED BEAM, AND INDICATOR MEANS CONNECTED WITH SAID RECEIVER AND RESPONSIVE TO VARIATIONS IN SAID MICROWAVE BEAM FOR PRODUCING AN OUTPUT INDICATIVE OF THE LOCATION OF ANOMALIES IN SAID PROPELLANT.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |