US3471815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensating inductor and circuit
Assignee: AT&T Inc
•
Filing: 1968-01-04
•
Granted: 1969-10-07
•
Expires: 1988-01-04
Abstract
No abstract record available.
Inventors
- 👤 Dwight W Grant
- 👤 Robert M Leafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:56
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/008; H01F29/00; H01F29/08; H01F29/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB479880A
Cited
US2837726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |