US3385772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for controlling the vapor pressure of the feed in a distillation operation
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1965-03-22
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Granted: 1968-05-28
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Expires: 1985-03-22
Abstract
No abstract record available.
Inventors
- 👤 Joe F Barker
- 👤 Norman E Luker
- 👤 Jr Bertram H Shoopman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:44
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4294; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10S62/00; Y10S62/902; Y10S62/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2119786A
Cited
US2367862A
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US2456398A
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US2767133A
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US2900312A
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US3056282A
Cited
US3271269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |