US2958472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fine particle pulverizer and classifier
Assignee: Commercial Solvents Corp
•
Filing: 1956-11-23
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Granted: 1960-11-01
•
Expires: 1976-11-23
Abstract
No abstract record available.
Inventors
- 👤 Edward A Erickson
- 👤 Henry J Nieschlag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:51
CPC Classifications
B; B02; B02C; B02C19/00; B02C19/06; B02C19/061; B02C23/00; B02C23/08; B02C23/10; B02C23/12
Claims Analysis
Total Claims: 0
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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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |