US3427128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing ramsdellit,a type of manganese dioxide
Assignee: VARTA PETRIX UNION GmbH
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Filing: 1963-10-23
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Granted: 1969-02-11
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Expires: 1983-10-23
Abstract
No abstract record available.
Inventors
- 👤 Alfred Schmier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:12
CPC Classifications
C; C01; C01G; C01G45/00; C01G45/02; C01G45/024; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2002/74; C01P2002/77
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1269914A
Cited
US2123250A
Cited
US2169368A
Cited
US2667405A
Cited
DE879387C
Cited
FR1306706A
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 |