US2623658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding materials at constant ratios
Assignee: FLSmidth and Co AS
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Filing: 1947-07-31
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Granted: 1952-12-30
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Expires: 1967-07-31
Abstract
No abstract record available.
Inventors
- 👤 Johansen Jens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:14
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/02; B65G47/16; B65G47/18; B65G47/19; B01; B01F; B01F35/00; B01F35/80; B01F35/892; G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/133; G05D11/134; B01F23/00; B01F23/60
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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |