Patent US2884571A successfully refreshed from Google Patents.
US2884571A
Expired / Lapsed
US
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Printed circuit
Assignee: GTE Sylvania Inc
•
Filing: 1952-07-12
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Granted: 1959-04-28
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Expires: 1972-07-12
Abstract
No abstract record available.
Inventors
- 👤 Wilson H Hannahs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:24
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/205; H05K3/18; H05K3/188; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0116; H05K2201/09; H05K2201/09818; H05K2201/09881; H05K2203/00; H05K2203/01; H05K2203/0147; H05K2203/0152; H05K2203/07; H05K2203/0703; H05K2203/0726
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2042030A
Cited
GB190105516A
Cited
US1647474A
Cited
US1916947A
Cited
CH176017A
Cited
US2241735A
Cited
US2441960A
Cited
US2582685A
Cited
US2641675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |