US2665323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative plate material for storage batteries
Assignee: NL Industries Inc
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Filing: 1950-09-02
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Granted: 1954-01-05
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Expires: 1970-09-02
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Mcfarlane
- 👤 Konig Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:24
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/627; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
ACTIVE MATERIAL FOR NEGATIVE LEAD STORAGE BATTERY PLATES COMPRISING PREDOMINANTLY LITHARGE AND A SMALL PROPORTION OF A WATER SOLUBLE SULPHONATED POLYCYCLIC SUBSTITUTED ALIPHATIC COMPOUND AND A SMALL PROPORTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 8-HYDROXYQUINOLINE 5-SULPHURIC ACID, 1-NAPHTHOL 5-SULPHONIC ACID AND THEIR ALKALI METAL SALTS.
Claim 2
Dependent Claim
48 words
ACTIVE MATERIAL FOR NEGATIVE LEAD STORAGE BATTERY PLATES COMPRISING PREDOMINANTLY LITHARGE AND A SMALL PROPORTION OF A WATER SOLUBLE SULPHONATED POLYCYCLIC SUBSTITUTED ALIPHATIC COMPOUND AND A SMALL PROPORTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 8-HYDROXYQUINOLINE 5-SULPHURIC ACID, 1-NAPHTHOL 5-SULPHONIC ACID AND THEIR ALKALI METAL SALTS.
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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |