Patent US3222497A successfully refreshed from Google Patents.
Patent US2772081A successfully refreshed from Google Patents.
US2772081A
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Vapor-liquid contacting apparatus
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1951-03-06
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Granted: 1956-11-27
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Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Henry J Hibshman
- 👤 James J Trexel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:48
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |