US2638217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulverulent material classifying means
Assignee: Kennedy Van Saun Manufacturing and Engineering Corp
•
Filing: 1950-06-22
•
Granted: 1953-05-12
•
Expires: 1970-06-22
Abstract
No abstract record available.
Inventors
- 👤 Niemitz Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:11
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/04
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) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |