Patent US2541899A successfully refreshed from Google Patents.
US2541899A
Expired / Lapsed
US
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Method and apparatus for forming briquettes
Assignee: SK Wellman Corp
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Filing: 1947-04-01
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Granted: 1951-02-13
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Expires: 1967-04-01
Abstract
No abstract record available.
Inventors
- 👤 Samuel K Wellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:18
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/02; B30B11/04; B30B15/00; B30B15/28; B30B15/281; B30B15/284; B30B15/30; B30B15/302; B30B15/304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US989211A
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US1503619A
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US1460287A
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US1790041A
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US2028021A
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US2075992A
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US2232103A
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US2214816A
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US2348197A
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US2398227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |