US2519399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active material for alkaline cells and method of preparing the same
Assignee: Individual
•
Filing: 1945-11-14
•
Granted: 1950-08-22
•
Expires: 1965-11-14
Abstract
No abstract record available.
Inventors
- 👤 Roberts Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:37
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A NEGATIVE ELECTRODE FOR ALKALINE CELLS COMPRISING AN ACTIVE MATERIAL CONSISTING OF PULVERULENT, METALLIC CADMIUM AND A SMALL PROPORTION OF POLYVINYL ALCOHOL.
Claim 2
Dependent Claim
22 words
A NEGATIVE ELECTRODE FOR ALKALINE CELLS COMPRISING AN ACTIVE MATERIAL CONSISTING OF PULVERULENT, METALLIC CADMIUM AND A SMALL PROPORTION OF POLYVINYL ALCOHOL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |