Patent US2561388A successfully refreshed from Google Patents.
US2561388A
Expired / Lapsed
US
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Classifier units for friable material pulverizers
Assignee: Microcyclomat Co
•
Filing: 1945-08-20
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Granted: 1951-07-24
•
Expires: 1965-08-20
Abstract
No abstract record available.
Inventors
- 👤 Henry G Lykken
- 👤 William H Lykken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:54
CPC Classifications
B; B02; B02C; B02C19/00; B02C19/0012; B02C19/005; B02C13/00; B02C13/14
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |