Patent US3523221A successfully refreshed from Google Patents.
US3523221A
Expired / Lapsed
US
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Bi-metal thin film component and beam-lead therefor
Assignee: Sprague Electric Co
•
Filing: 1968-05-07
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Granted: 1970-08-04
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Expires: 1988-05-07
Abstract
No abstract record available.
Inventors
- 👤 Melvin Tierman
- 👤 William E Wesolowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:17
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3257592A
Cited
US2993266A
Cited
US3028447A
Cited
US3335338A
Cited
US3381256A
Cited
US3445727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |