Patent US2981772A successfully refreshed from Google Patents.
US2981772A
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Alkylation process
Assignee: Shell USA Inc
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Filing: 1959-08-28
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Granted: 1961-04-25
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Expires: 1979-08-28
Abstract
No abstract record available.
Inventors
- 👤 Holzman George
- 👤 John J Madison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:39
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; C07C2531/00; C07C2531/02; C07C2531/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN A PROCESS FOR ALKYLATING ISOPARAFFINS WITH OLEFINS, THE STEP OF CONTACTING SAID ISOPARAFFINS WITH SAID OLEFINS, UNDER ALKYLATION CONDITIONS IN THE PRESENCE OF AN ACID CATALYST, SAID ACID COMPRISING A MIXTURE OF CONCENTRATED SULFURIC ACID AND A TRI-SUBSTITUTED ACETIC ACID IN WHICH ALL THE ALKYL HYDROGEN ATOMS OF THE ACETIC ACID HAVE BEEN SUBSTITUTED WITH THE SAME HALOGEN HAVING AN ATOMIC WEIGHT OF NO MORE THAN 36.
Claim 2
Dependent Claim
68 words
IN A PROCESS FOR ALKYLATING ISOPARAFFINS WITH OLEFINS, THE STEP OF CONTACTING SAID ISOPARAFFINS WITH SAID OLEFINS, UNDER ALKYLATION CONDITIONS IN THE PRESENCE OF AN ACID CATALYST, SAID ACID COMPRISING A MIXTURE OF CONCENTRATED SULFURIC ACID AND A TRI-SUBSTITUTED ACETIC ACID IN WHICH ALL THE ALKYL HYDROGEN ATOMS OF THE ACETIC ACID HAVE BEEN SUBSTITUTED WITH THE SAME HALOGEN HAVING AN ATOMIC WEIGHT OF NO MORE THAN 36.
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |