Patent US2415159A successfully refreshed from Google Patents.
US2415159A
Expired / Lapsed
US
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Apparatus for stripping sulfur trioxide from oleum
Assignee: EIDP Inc
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Filing: 1942-06-13
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Granted: 1947-02-04
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Expires: 1962-06-13
Abstract
No abstract record available.
Inventors
- 👤 John J Bradley
- 👤 Regenbrecht Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:31
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1294827A
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US1254689A
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US1380689A
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GB495715A
Cited
US2281534A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |