US2837589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Active material for storage batteries
Assignee: NL Industries Inc
•
Filing: 1954-07-19
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Granted: 1958-06-03
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Expires: 1974-07-19
Abstract
No abstract record available.
Inventors
- 👤 Konig Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:26
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
39 words
A COMPOSITION FOR USE AS ACTIVE MATERIAL IN STORAGE BATTERY PLATES COMPRISING LEAD OXIDE AND ABOUT 0.1 TO 1% BY WEIGHT OF SAID COMPOSITION OF AN ALKALI SALT OF A CONDENSATION PRODUCT OF FORMALDEHYDE AND A SULFONATED PHENOLIC COMPOUND.
Claim 2
Dependent Claim
39 words
A COMPOSITION FOR USE AS ACTIVE MATERIAL IN STORAGE BATTERY PLATES COMPRISING LEAD OXIDE AND ABOUT 0.1 TO 1% BY WEIGHT OF SAID COMPOSITION OF AN ALKALI SALT OF A CONDENSATION PRODUCT OF FORMALDEHYDE AND A SULFONATED PHENOLIC COMPOUND.
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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |