US2769773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylethylpyridine-methylvinylpyridine fractionation
Assignee: Phillips Petroleum Co
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Filing: 1953-08-21
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Granted: 1956-11-06
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Expires: 1973-08-21
Abstract
No abstract record available.
Inventors
- 👤 William E Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:23
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; B; B01; B01D; B01D3/00; B01D3/14; Y; Y10; Y10S; Y10S159/00; Y10S159/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
IN A PROCESS FOR THE FRACTIONAL DISTILLATION OF A MIXTURE OF ORGANIC COMPOUNDS WHEREIN HEAT IS SUPPLIED TO THE DISTILLATION ZONE BY INJECTION OF A SUPERHEATED STEAM, THE IMPROVEMENT COMPRISING MAINTAINING THE LIQUID LEVEL SUBSTANTIALLY CONSTANT IN THE DISTILLATION ZONE BY ADJUSTING THE TEMPERATURE OF THE INJECTED SUPERHEATED STEAM IN RESPONSE TO VARIATIONS IN SAID LIQUID LEVEL.
Claim 2
Dependent Claim
57 words
IN A PROCESS FOR THE FRACTIONAL DISTILLATION OF A MIXTURE OF ORGANIC COMPOUNDS WHEREIN HEAT IS SUPPLIED TO THE DISTILLATION ZONE BY INJECTION OF A SUPERHEATED STEAM, THE IMPROVEMENT COMPRISING MAINTAINING THE LIQUID LEVEL SUBSTANTIALLY CONSTANT IN THE DISTILLATION ZONE BY ADJUSTING THE TEMPERATURE OF THE INJECTED SUPERHEATED STEAM IN RESPONSE TO VARIATIONS IN SAID LIQUID LEVEL.
References Cited (Backward Citations)
US2350447A
Cited
US2208296A
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US2411809A
Cited
GB666499A
Cited
US2607720A
Cited
US2556030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |