US2664452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for alkylation utilizing evaporative cooling
Assignee: Stratford Engineering Corp
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Filing: 1952-11-07
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Granted: 1953-12-29
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Expires: 1972-11-07
Abstract
No abstract record available.
Inventors
- 👤 David H Putney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:26
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
IN AN ALKYLATION PROCESS WHEREIN ISOBUTAN AND OLEFINS ARE CONTACTED WITH A LIQUID ACID CATALYST IN A REACTION STEP, AND A MIXTURE OF HYDROCARBONS CONTAINING LESS THAN 35% NORMAL PARAFFINS IS WITHDRAWN WITH THE ACID CATALYST AS EFFLUENT FROM SAID REACTION STEP, THE IMPROVEMENT WHICH COMPRISES SEPARATING SAID EFFLUENT INTO A
Claim 2
Dependent Claim
51 words
IN AN ALKYLATION PROCESS WHEREIN ISOBUTAN AND OLEFINS ARE CONTACTED WITH A LIQUID ACID CATALYST IN A REACTION STEP, AND A MIXTURE OF HYDROCARBONS CONTAINING LESS THAN 35% NORMAL PARAFFINS IS WITHDRAWN WITH THE ACID CATALYST AS EFFLUENT FROM SAID REACTION STEP, THE IMPROVEMENT WHICH COMPRISES SEPARATING SAID EFFLUENT INTO A
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) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |