US3427153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing alloy blacks
Assignee: Leesona Corp
•
Filing: 1964-06-11
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Granted: 1969-02-11
•
Expires: 1984-06-11
Abstract
No abstract record available.
Inventors
- 👤 Peruvemba Swaminath Venkatesan
- 👤 Melvin Yarish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:47
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/92; B; B01; B01J; B01J23/00; B01J23/38; H01M4/928; H01M2004/8678; H01M2004/8684; H01M2004/8689; H01M2300/00; H01M2300/0002; H01M2300/0014; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2254976A
Cited
US2375506A
Cited
US2726151A
Cited
US2787540A
Cited
US2863762A
Cited
US2970051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |