US3419767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controllable electrical resistance
Assignee: Telefunken Electronic GmbH
•
Filing: 1966-12-08
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Granted: 1968-12-31
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Expires: 1986-12-08
Abstract
No abstract record available.
Inventors
- 👤 Dahlberg Reinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:54
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/81; H10N10/817; H10D; H10D12/00; H10D12/211; H10D12/212; H10D89/00; H10D89/10; H10D89/105; H10D99/00; H10N19/00; H10P; H10P95/00; H10W; H10W40/00; H10W40/20; H10W40/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3252013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |