Patent US2428850A successfully refreshed from Google Patents.
US2428850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deferred action dry cell with magnesium electrode
Assignee: Burgess Battery Co
•
Filing: 1941-12-26
•
Granted: 1947-10-14
•
Expires: 1961-12-26
Abstract
No abstract record available.
Inventors
- 👤 Herbert E Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:40
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/32; H01M6/04; H01M6/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US293563A
Cited
US303237A
Cited
US405196A
Cited
US1148152A
Cited
US1401671A
Cited
US1393739A
Cited
US1662866A
Cited
US1920151A
Cited
GB423301A
Cited
AU856032A
Cited
US2040255A
Cited
US2078143A
Cited
US2272969A
Cited
US2257129A
Cited
US2322210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |