Patent US3218644A successfully refreshed from Google Patents.
US3218644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency independent slot antenna
Assignee: Collins Radio Co
•
Filing: 1963-06-19
•
Granted: 1965-11-16
•
Expires: 1983-06-19
Abstract
No abstract record available.
Inventors
- 👤 David G Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:56
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A FREQUENCY INDEPENDENT ANTENNA COMPRISING: FIRST AND SECOND PARALLEL POSITIONED CONDUCTIVE PLATES WITH AT LEAST ONE OF SAID CONDUCTIVE PLATES HAVING A FIRST PLURALITY OF PARALLEL POSITIONED SLOTS CUT THEREIN, SAID SLOTS BEING ARRANGED WITH THEIR ENDS LYING ALONG A GENERALLY TRIANGULAR CONFIGURATION, THE RADIAL DISTANCE OF ANY SLOT MEASURED FROM THE VERTEX OF SAID TRIANGLE BEARING A RATIO $ TO THE RADIAL DISTANCE OF THE ADJACENT SLOT NEXT FARTHEST REMOVED FROM THE SAID VERTEX OF SAID TRIANGLE, CENTER CONDUCTOR MEANS EXTENDING BETWEEN SAID CONDUCTIVE PLATES AND ADJACENT THE MIDPOINTS OF SAID SLOTS, SEGMENTED CYLINDRICAL MEANS SEPARATED BY GAPS AND POSITIONED CONCENTRICALLY AROUND SAID CENTER CONDUCTOR, THE LENGTHS OF THE CYLINDRICAL SEGMENTS BEING CONSTRUCTED TO POSITION A SINGLE GAP BETWEEN ADJACENT SLOTS TO CAUSE THE RADIAL DISTANCE OF EACH GAP FROM THE VERTEX OF SAID TRIANGLE TO BEAR A RATIO $$ TO THE RADIAL DISTANCE OF THE ADJACENT SLOT NEXT FARTHEST REMOVED FROM SAID VERTEX, SHORTING MEANS FOR SHORTING ONE END OF EACH CYLINDRICAL SEGMENT TO SAID CENTER CONDUCTOR, AND MEANS FOR SUPPLYING AN INPUT SIGNAL ACROSS SAID PARALLEL PLATES AND SAID CENTER CONDUCTOR.
Claim 2
Dependent Claim
184 words
A FREQUENCY INDEPENDENT ANTENNA COMPRISING: FIRST AND SECOND PARALLEL POSITIONED CONDUCTIVE PLATES WITH AT LEAST ONE OF SAID CONDUCTIVE PLATES HAVING A FIRST PLURALITY OF PARALLEL POSITIONED SLOTS CUT THEREIN, SAID SLOTS BEING ARRANGED WITH THEIR ENDS LYING ALONG A GENERALLY TRIANGULAR CONFIGURATION, THE RADIAL DISTANCE OF ANY SLOT MEASURED FROM THE VERTEX OF SAID TRIANGLE BEARING A RATIO $ TO THE RADIAL DISTANCE OF THE ADJACENT SLOT NEXT FARTHEST REMOVED FROM THE SAID VERTEX OF SAID TRIANGLE, CENTER CONDUCTOR MEANS EXTENDING BETWEEN SAID CONDUCTIVE PLATES AND ADJACENT THE MIDPOINTS OF SAID SLOTS, SEGMENTED CYLINDRICAL MEANS SEPARATED BY GAPS AND POSITIONED CONCENTRICALLY AROUND SAID CENTER CONDUCTOR, THE LENGTHS OF THE CYLINDRICAL SEGMENTS BEING CONSTRUCTED TO POSITION A SINGLE GAP BETWEEN ADJACENT SLOTS TO CAUSE THE RADIAL DISTANCE OF EACH GAP FROM THE VERTEX OF SAID TRIANGLE TO BEAR A RATIO $$ TO THE RADIAL DISTANCE OF THE ADJACENT SLOT NEXT FARTHEST REMOVED FROM SAID VERTEX, SHORTING MEANS FOR SHORTING ONE END OF EACH CYLINDRICAL SEGMENT TO SAID CENTER CONDUCTOR, AND MEANS FOR SUPPLYING AN INPUT SIGNAL ACROSS SAID PARALLEL PLATES AND SAID CENTER CONDUCTOR.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |