US3177987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intermittently-lapped extendible boom
Assignee: Individual
•
Filing: 1962-02-26
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Granted: 1965-04-13
•
Expires: 1982-02-26
Abstract
No abstract record available.
Inventors
- 👤 Frank H Swaim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:19
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/085; H01Q1/087
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
143 words
IN AN EXTENDIBLE ANTENNA DEVICE, AN EXTENDIBLE ELEMENT COMPRISING AN ELONGATED, RELATIVELY THIN, NARROW STRIP HAVING ALTERNATING TABS AND NOTCHES FORMED ON THE OPPOSITE LONGITUDINAL EDGES THEREOF, SAID NOTCHES BEING DEFINED BY SAID TABS AND THE TABS ON ONE EDGE BEING POSITIONED OPPOSITE THE NOTCHES ON THE OTHER EDGE, SAID STRIP BEING RESILIENT AND HAVING A PREDETERMINED SET SO THAT WHEN UNRESTRAINED IT TENDS TO FORM INTO AN ELONGATED TUBE LONGITUDINAL AXIS OF WHICH LIES PARALLEL TO THE LONGITUDINAL CENTER LINE OF SAID STRIP, SAID PREDETERMINED SET IN SAID RESILIENT STRIP BEING SUCH THAT THE STRIP TENDS TO FORM A TUBE HAVING A CIRCUMFERENCE SUBSTANTIALLY LESS THAN THE ARC LENGTH MEASURED BETWEEN THE BOTTOM EDGE OF OPPOSITELY POSITIONED TABS ON THE EDGES OF SAID STRIP, WHEREBY SAID TABS AND NOTCHES ARE RESILIENTLY URGED INTO INTERLOCKING ENGAGEMENT WHEN SAID STRIP ASSUMES A TUBULAR CONFIGURATION.
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |