Patent US2658735A successfully refreshed from Google Patents.
US2658735A
Expired / Lapsed
US
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Gas-liquid contact apparatus for removing contaminants from gases
Assignee: Individual
•
Filing: 1950-08-10
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Granted: 1953-11-10
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Expires: 1970-08-10
Abstract
No abstract record available.
Inventors
- 👤 Ybarrondo Vincent C De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:02
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/021; B01D47/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US824469A
Cited
US943422A
Cited
US1585502A
Cited
US1586763A
Cited
GB302386A
Cited
US1808956A
Cited
US1939949A
Cited
US2057100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |