US3289205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining electromagnetic characteristics of large surface area passive reflectors
Assignee: Individual
•
Filing: 1965-05-17
•
Granted: 1966-11-29
•
Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 Kampinsky Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:27
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
THE METHOD OF DETERMINING THE BACKSCATTER OF AN ELECTROMAGNETIC WAVE INCIDENT ON A LARGE REFLECTING SURFACE, SAID REFLECTING SURFACE BEING FORMED FROM AN INFLATED MEMBRANE, WITH THE DIMENSIONS OF SAID REFLECTING SURFACE BEING LARGE WITH RESPECT TO THE WAVELENGTH OF SAID ELECTROMAGNETIC WAVE, SAID METHOD COMPRISING THE STEPS OF PROVIDING A SAMPLE OF THE MEMBRANE HAVING A CENTRAL AREA ENCOMPASSING AT LEAST THE FIRST FRESNEL ZONE OF ELECTROMAGNETIC ENERGY INCIDENT THEREON, CONTOURING THE CENTRAL AREA AND THE ADJACENT PERIPHERAL AREA OF SAID SAMPLE OF MEMBRANE TO CONFORM TO A SEGMENT OF SAID REFLECTING SURFACE, ILLUMINATING THE CENTRAL AREA OF SAID SAMPLE OF MEMBRANE WITH AN ELECTROMAGNETIC WAVE, SAID ELECTROMAGNETIC WAVE BEING DIRECTED SO THAT THE PERIPHERY OF SAID SAMPLE OF MEMBRANE IS UNDERILLUMINATED A SPECIFIED AMOUNT WITH RESPECT TO SAID CENTRAL AREA, AND RECEIVING REFLECTIONS OF SAID ELECTROMAGNETIC ENERGY FROM SAID SAMPLE SEGMENT OF MEMBRANE, SAID REFLECTIONS BEING INDICATIVE OF THE BACKSCATTER FROM THE TOTAL REFLECTIVE SURFACE TO BE FORMED FROM SAID MEMBRANE.
Claim 2
Independent Claim
163 words
THE METHOD OF DETERMINING THE BACKSCATTER OF AN ELECTROMAGNETIC WAVE INCIDENT ON A LARGE REFLECTING SURFACE, SAID REFLECTING SURFACE BEING FORMED FROM AN INFLATED MEMBRANE, WITH THE DIMENSIONS OF SAID REFLECTING SURFACE BEING LARGE WITH RESPECT TO THE WAVELENGTH OF SAID ELECTROMAGNETIC WAVE, SAID METHOD COMPRISING THE STEPS OF PROVIDING A SAMPLE OF THE MEMBRANE HAVING A CENTRAL AREA ENCOMPASSING AT LEAST THE FIRST FRESNEL ZONE OF ELECTROMAGNETIC ENERGY INCIDENT THEREON, CONTOURING THE CENTRAL AREA AND THE ADJACENT PERIPHERAL AREA OF SAID SAMPLE OF MEMBRANE TO CONFORM TO A SEGMENT OF SAID REFLECTING SURFACE, ILLUMINATING THE CENTRAL AREA OF SAID SAMPLE OF MEMBRANE WITH AN ELECTROMAGNETIC WAVE, SAID ELECTROMAGNETIC WAVE BEING DIRECTED SO THAT THE PERIPHERY OF SAID SAMPLE OF MEMBRANE IS UNDERILLUMINATED A SPECIFIED AMOUNT WITH RESPECT TO SAID CENTRAL AREA, AND RECEIVING REFLECTIONS OF SAID ELECTROMAGNETIC ENERGY FROM SAID SAMPLE SEGMENT OF MEMBRANE, SAID REFLECTIONS BEING INDICATIVE OF THE BACKSCATTER FROM THE TOTAL REFLECTIVE SURFACE TO BE FORMED FROM SAID MEMBRANE.
References Cited (Backward Citations)
US2552489A
Cited
US3025463A
Cited
US3130406A
Cited
US3031928A
Cited
US3081432A
Cited
US3144910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |