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US2689977A
Expired / Lapsed
US
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Means for briquetting finely granular material and more especially to an improvement in the molding equipment of ring-roller moldng presses
Assignee: Individual
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Filing: 1951-01-17
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Granted: 1954-09-28
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Expires: 1971-01-17
Abstract
No abstract record available.
Inventors
- 👤 Hubmann Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:06
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/20; Y; Y10; Y10S; Y10S425/00; Y10S425/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE713849C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |