US2640090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery
Assignee: Willard Storage Battery Co
•
Filing: 1949-06-03
•
Granted: 1953-05-26
•
Expires: 1969-06-03
Abstract
No abstract record available.
Inventors
- 👤 Leo E Pucher
- 👤 William A Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:45
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/30; H01M6/32; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/582; H01M6/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A BATTERY COMPRISING A NEGATIVE PLATE HAVING MAGNESIUM AS THE ACTIVE AGENT, AND A POSITIVE PLATE COMPOSED ESSENTIALLY OF CUPROUS CHLORIDE AND A CHLORIDE OF THE GROUP CONSISTING OF SILVER CHLORIDE AMMONIUM CHLORIDE AND POTASSIUM CHORIDE.
References Cited (Backward Citations)
US270702A
Cited
US2322210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |