US2440285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulverizing and classifying machine having a rotor comprising superimposed sections
Assignee: Individual
•
Filing: 1943-04-28
•
Granted: 1948-04-27
•
Expires: 1963-04-28
Abstract
No abstract record available.
Inventors
- 👤 Henry G Lykken
- 👤 William H Lykken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/14
Claims Analysis
Total Claims: 0
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US2294921A
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US2304264A
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US2286987A
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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) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |