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US3418552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separable transformer battery charger
Assignee: General Electric Co
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Filing: 1965-06-08
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Granted: 1968-12-24
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Expires: 1985-06-08
Abstract
No abstract record available.
Inventors
- 👤 Robert G Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:50
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/14; H01F27/00; H01F27/02; H01F27/022; H01F27/40; H02; H02J; H02J4/00; H02J4/20; H02J4/25; H02J50/00; H02J50/005; H02J50/10; H02J7/00; H02J7/02; H02J7/70; H02J7/731; Y; Y10; Y10S; Y10S336/00; Y10S336/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A BATTERY CHARGER COMPRISING: A SUBSTANTIALLY HOLLOW BASE INCLUDING SIDE WALLS AND A TOP WALL, SAID TOP WALL DEFINING AN OPENING THEREIN; A THIN-WALLED CUP OF NONMAGNETIC MATERIAL EXTENDING DOWNWARDLY INTO SAID BASE FROM SAID OPENING, FORMING AS A WELL IN SAID TOP WALL, THE BOTTOM OF SAID CUP DEFINING A SUBSTANTIALLY CENTRAL OPENING THERETHROUGH; A CUP-SHAPED RECEPTACLE OF MAGNETIC MATERIAL MOUNTED WITHIN SAID BASE WITH ITS OPEN END ENCIRCLING SAID CUP, THE SIDE WALL OF SAID RECEPTACLE DEFINING A SLOT THERETHROUGH, AND THE BOTTOM WALL OF SAID RECEPTACLE BEING SPACED FROM THE BOTTOM OF SAID CUP; A STUD OF MAGNETIC MATERIAL HAVING A FIRST END SECURED TO THE BOTTOM
Claim 2
Dependent Claim
110 words
A BATTERY CHARGER COMPRISING: A SUBSTANTIALLY HOLLOW BASE INCLUDING SIDE WALLS AND A TOP WALL, SAID TOP WALL DEFINING AN OPENING THEREIN; A THIN-WALLED CUP OF NONMAGNETIC MATERIAL EXTENDING DOWNWARDLY INTO SAID BASE FROM SAID OPENING, FORMING AS A WELL IN SAID TOP WALL, THE BOTTOM OF SAID CUP DEFINING A SUBSTANTIALLY CENTRAL OPENING THERETHROUGH; A CUP-SHAPED RECEPTACLE OF MAGNETIC MATERIAL MOUNTED WITHIN SAID BASE WITH ITS OPEN END ENCIRCLING SAID CUP, THE SIDE WALL OF SAID RECEPTACLE DEFINING A SLOT THERETHROUGH, AND THE BOTTOM WALL OF SAID RECEPTACLE BEING SPACED FROM THE BOTTOM OF SAID CUP; A STUD OF MAGNETIC MATERIAL HAVING A FIRST END SECURED TO THE BOTTOM
References Cited (Backward Citations)
US3277358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |