US3457489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging circuits
Assignee: TEAL IND Inc
•
Filing: 1966-09-26
•
Granted: 1969-07-22
•
Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Martin Butler Gentry Jr
- 👤 Thomas Guy Collings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:02
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/90; H02J7/971; H02J7/975; Y; Y10; Y10S; Y10S320/00; Y10S320/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1424731A
Cited
GB549018A
Cited
US2427729A
Cited
US3278823A
Cited
US3225280A
Cited
US3310724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |