US2547416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric lens
Assignee: AT&T Inc
•
Filing: 1946-12-19
•
Granted: 1951-04-03
•
Expires: 1966-12-19
Abstract
No abstract record available.
Inventors
- 👤 Albert M Skellett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:49
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/06; H01Q19/08; H01Q15/00; H01Q15/02; H01Q15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1906546A
Cited
US2206923A
Cited
US2283935A
Cited
US2273447A
Cited
US2422579A
Cited
US2429601A
Cited
US2405992A
Cited
US2415352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |