US3190935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification process
Assignee: Phillips Petroleum Co
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Filing: 1961-12-11
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Granted: 1965-06-22
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Expires: 1981-12-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas Hutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:15
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C7/00; C07C7/148; C07C7/14875; C07C7/14883; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD FOR REMOVAL OF ALKYL FLUORIDES FROM PROPANE AND NORMAL BUTANE WHICH COMPRISES INTRODUCING SAID PROPANE AND NORMAL BUTANE INTO A REACTION ZONE WHEREIN ISOBUTANE IS BEING ALKYLATED WITH AN OLEFIN IN THE PRESENCE OF HF CATALYST, SUBJECTING SAID INTRODUCED MATERIAL TO THE CONDITIONS OF ALKYLATION AND SUBSEQUENTLY RECOVERING THE THUS PURIFIED PROPANE AND NORMAL BUTANE FREE FROM ALKYL FLUORIDE CONTENT.
Claim 2
Independent Claim
62 words
A METHOD FOR REMOVAL OF ALKYL FLUORIDES FROM PROPANE AND NORMAL BUTANE WHICH COMPRISES INTRODUCING SAID PROPANE AND NORMAL BUTANE INTO A REACTION ZONE WHEREIN ISOBUTANE IS BEING ALKYLATED WITH AN OLEFIN IN THE PRESENCE OF HF CATALYST, SUBJECTING SAID INTRODUCED MATERIAL TO THE CONDITIONS OF ALKYLATION AND SUBSEQUENTLY RECOVERING THE THUS PURIFIED PROPANE AND NORMAL BUTANE FREE FROM ALKYL FLUORIDE CONTENT.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |