US2681769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for densifying powders and for transferring them from one atmosphere to another
Assignee: Dow Chemical Co
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Filing: 1953-02-26
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Granted: 1954-06-22
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Expires: 1973-02-26
Abstract
No abstract record available.
Inventors
- 👤 Louis O Simenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:15
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/20; B30; B30B; B30B11/00; B30B11/02; B30B11/04; D; D21; D21B; D21B1/00; D21B1/04; D21B1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |