US2235487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of compositions of lead oxide (pbo) and finely divided metallic lead
Assignee: NL Industries Inc
•
Filing: 1937-02-10
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Granted: 1941-03-18
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Expires: 1957-02-10
Abstract
No abstract record available.
Inventors
- 👤 Mayer Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:47
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/56; H01M4/57; C; C01; C01G; C01G21/00; C01G21/02; C01G21/06; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/60; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-03-17 | 1944-09-16 | 1945-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-03-17 | 1948-09-16 | 1949-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-03-17 | 1952-09-16 | 1953-03-18 | $7700.00 | Window Closed / Lapsed |