US2745890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of polymer hydrocarbons
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-03-29
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Granted: 1956-05-15
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Expires: 1972-03-29
Abstract
No abstract record available.
Inventors
- 👤 Robert P Cahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:49
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/903
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
IN A PROCESS FOR THE POLYMERIZATION OF A FEED STREAM COMPRISING UNSATURATED HYDROCARBONS CONTAINING FOUR OR LESS CARBON ATOMS WHEREIN SAID FEED IS DILUTED WITH BUTANE PRIOR TO POLYMERIZATION BY RECYCLING BUTANE TO A DEBUTANIZATION TOWER INTO WHICH SAID FEED STREAM IS INTRODUCED AND FROM WHICH A BOTTOMS STREAM FREE OF UNSATURATED HYDROCARBONS BUT CONTAINING AT LEAST SOME BUTANE IS REMOVED, THE IMPROVEMENT COMPRISING INTRODUCING RECYCLED BUTANE VAPORS INTO SAID TOWER AT A POINT BELOW THAT AT WHICH SAID FEED STREAM IS INTRODUCED, WHEREBY SAID BUTANE VAPORS RISE UPWARDLY THROUGH SAID TOWER PAST THE POINT OF INTRODUCTION OF SAID UNSATURATED HYDROCARBONS, CARRYING SAID UNSATURATED HYDROCARBONS TO THE TOP OF SAID TOWER, AND EFFECTIVELY BLOCKING SAID UNSATURATED HYDROCARBONS FROM ACCESS TO THE BOTTOM OF SAID TOWER.
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) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |