Patent US3307196A successfully refreshed from Google Patents.
US3307196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luneberg type lens formed by spiral winding elongated strip of variable dielectric constant material
Assignee: Armstrong World Industries Inc
•
Filing: 1962-12-28
•
Granted: 1967-02-28
•
Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 Robert L Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:35
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/02; H01Q15/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A TWO-DIMENSIONAL SUBSTANTIALLY CONSTANT THICKNESS DIELECTRIC LENS COMPRISING A PLURALITY OF ELONGATED LIKEWIDTH RELATIVELY FLEXIBLE MODULES OF DIELECTRIC MATERIAL, EACH OF WHICH EXHIBITS A PROGRESSIVE ONE-DIMENSIONAL VARIATION IN DIELECTRIC CONSTANT IN AT LEAST ITS DIRECTION OF ELONGATION, DISPOSED SIDE-BY-SIDE TO ONE ANOTHER IN A SPIRAL CONFIGURATION OF INTERLEAVED OVERLAPPING TURNS.
Claim 2
Dependent Claim
50 words
A TWO-DIMENSIONAL SUBSTANTIALLY CONSTANT THICKNESS DIELECTRIC LENS COMPRISING A PLURALITY OF ELONGATED LIKEWIDTH RELATIVELY FLEXIBLE MODULES OF DIELECTRIC MATERIAL, EACH OF WHICH EXHIBITS A PROGRESSIVE ONE-DIMENSIONAL VARIATION IN DIELECTRIC CONSTANT IN AT LEAST ITS DIRECTION OF ELONGATION, DISPOSED SIDE-BY-SIDE TO ONE ANOTHER IN A SPIRAL CONFIGURATION OF INTERLEAVED OVERLAPPING TURNS.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |