US2580581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for handling finely divided materials
Assignee: Kennedy Van Saun Manufacturing & Enginee
•
Filing: 1946-04-01
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Granted: 1952-01-01
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Expires: 1966-04-01
Abstract
No abstract record available.
Inventors
- 👤 Niemitz Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
F; F23; F23K; F23K3/00; F23K2203/00; F23K2203/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1468966A
Cited
DE497466C
Cited
US1231327A
Cited
US1203703A
Cited
US1541903A
Cited
US1941429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |