US3255455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassegrain antenna
Assignee: Siemens and Halske AG
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Filing: 1962-07-24
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Granted: 1966-06-07
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Expires: 1982-07-24
Abstract
No abstract record available.
Inventors
- 👤 Trentini Giswalt Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:30
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/18; H01Q19/19; H01Q19/191; H01Q3/00; H01Q3/02; H01Q3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
AN ANTENNA FOR VERY SHORT ELECTROMAGNETIC WAVES, COMPRISING A PARABOLA MIRROR WITH AN APERTURE WHICH IS VERY LARGE AS COMPARED WITH THE WAVES, A HYPERBOLOID-LIKE AUXILIARY REFLECTOR HAVING AN APERTURE WHICH IS CONSIDERABLY SMALLER THAN THAT OF THE MIRROR, A PRIMARY RADIATOR DISPOSED AT THE BACK OF SAID MIRROR ADJACENT THE APEX OF THE LATTER, SAID AUXILIARY REFLECTOR BEING COOPERABLE WITH SAID PRIMARY RADIATOR FOR REFLECTING SAID WAVES FROM THE LATTER TO SAID MIRROR, SAID PRIMARY RADIATOR COMPRISING A HORN PARABOLA HAVING AN APERTURE WHICH IS SMALL AS COMPARED WITH THE APERTURE OF THE PARABOLA MIRROR, THE FUNNEL PORTION OF SAID HORN PARABOLA EXTENDING RADIALLY WITH RE-
Claim 2
Dependent Claim
107 words
AN ANTENNA FOR VERY SHORT ELECTROMAGNETIC WAVES, COMPRISING A PARABOLA MIRROR WITH AN APERTURE WHICH IS VERY LARGE AS COMPARED WITH THE WAVES, A HYPERBOLOID-LIKE AUXILIARY REFLECTOR HAVING AN APERTURE WHICH IS CONSIDERABLY SMALLER THAN THAT OF THE MIRROR, A PRIMARY RADIATOR DISPOSED AT THE BACK OF SAID MIRROR ADJACENT THE APEX OF THE LATTER, SAID AUXILIARY REFLECTOR BEING COOPERABLE WITH SAID PRIMARY RADIATOR FOR REFLECTING SAID WAVES FROM THE LATTER TO SAID MIRROR, SAID PRIMARY RADIATOR COMPRISING A HORN PARABOLA HAVING AN APERTURE WHICH IS SMALL AS COMPARED WITH THE APERTURE OF THE PARABOLA MIRROR, THE FUNNEL PORTION OF SAID HORN PARABOLA EXTENDING RADIALLY WITH RE-
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |