Patent US4664682A successfully refreshed from Google Patents.
Patent US2594971A successfully refreshed from Google Patents.
US2594971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barrier nonreflectant to incident electromagnetic waves
Assignee: General Electric Co
•
Filing: 1945-03-09
•
Granted: 1952-04-29
•
Expires: 1965-03-09
Abstract
No abstract record available.
Inventors
- 👤 Moullin Eric Balliol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:33
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/02; H01J25/06; H01J25/08; G; G01; G01R; G01R29/00; G01R29/08; G01R29/10; G01R29/105; H01J25/10; H01Q; H01Q17/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US546802A
Cited
US1920741A
Cited
US2219941A
Cited
FR802728A
Cited
AU2271135A
Cited
US2151118A
Cited
US2106039A
Cited
US2235010A
Cited
US2304540A
Cited
US2296678A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |