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Patent US2481899A successfully refreshed from Google Patents.
US2481899A
Expired / Lapsed
US
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Prevention of foaming in steam generation
Assignee: ChampionX LLC
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Filing: 1942-09-19
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Granted: 1949-09-13
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Expires: 1962-09-19
Abstract
No abstract record available.
Inventors
- 👤 Paul G Bird
- 👤 Arthur L Jacoby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:24
CPC Classifications
B; B01; B01B; B01B1/00; B01B1/02; B01B1/04
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) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |