US3195137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassegrainian antenna with aperture blocking correction
Assignee: AT&T Inc
•
Filing: 1960-12-27
•
Granted: 1965-07-13
•
Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Jakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:39
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/02; H01Q19/021; H01Q19/027; H01Q19/10; H01Q19/18; H01Q19/19; H01Q19/191; H01Q19/195
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN AN ANTENNA SYSTEM FOR RADIATING AND RECEIVING CIRCULARLY-POLARIZED SIGNALS, A PARABOLIODAL REFLECTOR HAVING A FOCUS AND A VERTEX, SAID PARABOLOID HAVING A HOLE LOCATED AT SAID VERTEX A HORN REFLECTOR LOCATED BEHIND SAID PARABOLOID, SAID HORN REFLECTOR HAVING AN ELLIPSOIDAL REFLECTING SURFACE WITH ONE FOCUS NEAR THE APEX OF SAID HORN REFLECTOR, AND A SECOND REFLECTOR FACING SAID PARABOLOID AND LOCATED TO CREATE A VIRTUAL SOURCE AND COLLECTOR OF SIGNALS AT SAID FOCUS OF SAID PARABOLOID, SAID SECOND REFLECTOR REFLECTING WITHOUT CHANGING THE DIRECTION OF ROTATION
Claim 2
Dependent Claim
87 words
IN AN ANTENNA SYSTEM FOR RADIATING AND RECEIVING CIRCULARLY-POLARIZED SIGNALS, A PARABOLIODAL REFLECTOR HAVING A FOCUS AND A VERTEX, SAID PARABOLOID HAVING A HOLE LOCATED AT SAID VERTEX A HORN REFLECTOR LOCATED BEHIND SAID PARABOLOID, SAID HORN REFLECTOR HAVING AN ELLIPSOIDAL REFLECTING SURFACE WITH ONE FOCUS NEAR THE APEX OF SAID HORN REFLECTOR, AND A SECOND REFLECTOR FACING SAID PARABOLOID AND LOCATED TO CREATE A VIRTUAL SOURCE AND COLLECTOR OF SIGNALS AT SAID FOCUS OF SAID PARABOLOID, SAID SECOND REFLECTOR REFLECTING WITHOUT CHANGING THE DIRECTION OF ROTATION
References Cited (Backward Citations)
US2032588A
Cited
FR898352A
Cited
FR911045A
Cited
US2736895A
Cited
US2741744A
Cited
US2825032A
Cited
US2952017A
Cited
US2983918A
Cited
US2972743A
Cited
US3089137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |