US3465273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toroidal inductor
Assignee: HUNTERDON TRANSFORMER Co
•
Filing: 1967-12-14
•
Granted: 1969-09-02
•
Expires: 1987-12-14
Abstract
No abstract record available.
Inventors
- 👤 Elwood M Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:06
CPC Classifications
H; H01; H01F; H01F30/00; H01F30/06; H01F30/16; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T29/49073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1531681A
Cited
US1882075A
Cited
US2446999A
Cited
US2591339A
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US2782386A
Cited
US2888541A
Cited
US3040162A
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US3201734A
Cited
US3210702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |