US3205497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terminal guidance system for navigable craft
Assignee: Individual
•
Filing: 1961-10-24
•
Granted: 1965-09-07
•
Expires: 1981-10-24
Abstract
No abstract record available.
Inventors
- 👤 Robert A Swadell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:14
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0676; G01; G01S; G01S13/00; G01S13/88; G01S13/91; G01S13/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A TUNED REED INDICATOR FOR USE IN AN INSTRUMENT LANDING SYSTEM FOR AN AIRCRAFT, SAID INDICATOR COMPRISING A FIRST SET OF REEDS ARRANGED IN A FIRST PLANE AND ECH TUNED TO VIBRATE AT A ONE OF A FIRST RANGE OF FREQUENCIES, AND A SECOND SET OF REEDS ARRANGED IN A SECOND PLANE TRANSVERSE TO SAID FIRST PLANE AND EACH TUNED TO VIBRATE AT A ONE OF A SECOND RANGE OF FREQUENCIES, ONE OF THE SETS OF REEDS HAVING A GAP THEREIN FOR RECEIVING THE OTHER SET.
Claim 2
Dependent Claim
86 words
A TUNED REED INDICATOR FOR USE IN AN INSTRUMENT LANDING SYSTEM FOR AN AIRCRAFT, SAID INDICATOR COMPRISING A FIRST SET OF REEDS ARRANGED IN A FIRST PLANE AND ECH TUNED TO VIBRATE AT A ONE OF A FIRST RANGE OF FREQUENCIES, AND A SECOND SET OF REEDS ARRANGED IN A SECOND PLANE TRANSVERSE TO SAID FIRST PLANE AND EACH TUNED TO VIBRATE AT A ONE OF A SECOND RANGE OF FREQUENCIES, ONE OF THE SETS OF REEDS HAVING A GAP THEREIN FOR RECEIVING THE OTHER SET.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |