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US3207696A
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Composition and method of forming an extended lead dioxide activator
Assignee: Shepherd Chemical Co
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Filing: 1963-01-18
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Granted: 1965-09-21
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Expires: 1983-01-18
Abstract
No abstract record available.
Inventors
- 👤 John F Shepherd
- 👤 Clark L Bachler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:41
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A METHOD OF FORMING AN EXTENDED LEAD DIOXIDE ACTIVATOR WHICH COMPRISES FORMING A SLURRY IN WATER OF FINELY DIVIDED BARIUM SULFATE AND A LEAD COMPOUND SELECTED FROM THE GROUP CONSISTING OF LEAD MONOXIDE, LEAD CARBONATE, RED LEAD, AND LEAD HYDROXIDE, OXIDIZING THE LEAD COMPOUND UNTIL SUBSTANTIALLY ALL THE LEAD COMPOUND IN THE SLURRY IS CONVERTED TO LEAD DIOXIDE TO FORM AN EXTENDED LEAD DIOXIDE ACTIVATOR, THE RATIO OF LEAD COMPOUND TO BARIUM SULFATE BEING SUCH THAT THE LEAD DIOXIDE ACTIVA-
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |