US2959404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-liquid contacting apparatus
Assignee: Gulf Oil Corp
•
Filing: 1956-12-31
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Granted: 1960-11-08
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Aksel C Eld
- 👤 William R Lehrian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:28
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/163; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1057576A
Cited
US1453735A
Cited
FR619029A
Cited
US2061830A
Cited
US2525064A
Cited
US2658737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |