US2794707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead acid accumulators
Assignee: Chloride Electrical Storage Co Ltd
•
Filing: 1953-11-18
•
Granted: 1957-06-04
•
Expires: 1973-11-18
Abstract
No abstract record available.
Inventors
- 👤 Walsh Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:31
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/68; H01M4/685; C; C22; C22C; C22C11/00; C22C11/02; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A DIE CAST GRID OF A LEAD ACID ELECTRIC ACCUMULATOR CONTAINING CALCIUM IN THE RANGE TO INHIBIT PRECIPITATION OF LEAD CALCIUM COMPOUNDS, FROM 0.03 TO NOT IN EXCESS OF 0.1%, TIN IN THE RANGE 1% TO 2%, ALUMINIUM IN THE RANGE 0.01 TO 0.1%, BALANCE LEAD.
Claim 2
Dependent Claim
46 words
A DIE CAST GRID OF A LEAD ACID ELECTRIC ACCUMULATOR CONTAINING CALCIUM IN THE RANGE TO INHIBIT PRECIPITATION OF LEAD CALCIUM COMPOUNDS, FROM 0.03 TO NOT IN EXCESS OF 0.1%, TIN IN THE RANGE 1% TO 2%, ALUMINIUM IN THE RANGE 0.01 TO 0.1%, BALANCE LEAD.
References Cited (Backward Citations)
US1813324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |