US2487547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave shielding arrangement
Assignee: GTE Sylvania Inc
•
Filing: 1943-11-20
•
Granted: 1949-11-08
•
Expires: 1963-11-20
Abstract
No abstract record available.
Inventors
- 👤 Norman L Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:00
CPC Classifications
H; H01; H01P; H01P1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2310695A
Cited
US2312723A
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US2296678A
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US2406402A
Cited
US2401489A
Cited
US2417542A
Cited
US2415242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |