Patent US2747108A successfully refreshed from Google Patents.
US2747108A
Expired / Lapsed
US
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Convertible alternating to direct current power supply and battery charging means for portable electrical equipment
Assignee: CONITECH Ltd
•
Filing: 1953-08-20
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Granted: 1956-05-22
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Expires: 1973-08-20
Abstract
No abstract record available.
Inventors
- 👤 Milton H Pelavin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:29
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/02; H02J7/60; H02J7/65; Y; Y10; Y10S; Y10S320/00; Y10S320/13; Y10S320/31
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |