US3624653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar-reflective balloons
Assignee: Individual
•
Filing: 1969-09-19
•
Granted: 1971-11-30
•
Expires: 1989-09-19
Abstract
Abstract Metallized polymeric dipoles are affixed to the surface of balloons which are tracked by radar.
Inventors
- 👤 Andrew J Kelly
- 👤 John J Lynch
- 👤 Robert G Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/081; H01Q1/082; G; G01; G01S; G01S13/00; G01S13/74; G01S13/75
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
22 words
A radar-reflective balloon which comprises an elastomeric balloon having metal-coated organic polymeric dipoles affixed to at least one surface of the balloon.
Claim 2
Dependent Claim
22 words
A radar-reflective balloon which comprises an elastomeric balloon having metal-coated organic polymeric dipoles affixed to at least one surface of the balloon.
Claim 3
Dependent Claim
17 words
The balloon of claim 1 wherein the dipoles have a diameter of less than about 0.125 inch.
Claim 4
Dependent Claim
28 words
The balloon of claim 1 wherein the dipoles have a length corresponding to the one-half wavelength of the radar signal to be reflected and whole number multiples thereof.
Claim 5
Dependent Claim
16 words
The balloon of claim 1 wherein said dipoles are cemented to the surface of said balloon.
Claim 6
Dependent Claim
12 words
The balloon of claim 1 wherein the dipoles are coated with silver.
Claim 7
Dependent Claim
12 words
The balloon of claim 1 wherein the dipoles are metallized nylon dipoles.
References Cited (Backward Citations)
US2752594A
Cited
US3324470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |