US3068305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing pure isobutylene
Assignee: Texaco Inc
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Filing: 1959-07-28
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Granted: 1962-12-11
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Expires: 1979-07-28
Abstract
No abstract record available.
Inventors
- 👤 Robert Y Heisler
- 👤 Howard V Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:18
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C1/207; C07C1/213; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054; C07C2527/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PREPARING PURE ISOBUTYLENE WHICH COMPRISES HEATING A T-BUTYL ESTER OF A HYDROCARBYL MONOCARBOXYLIC ACID CONTAINING 2-18 CARBON ATOMS IN THE PRESENCE OF 0.05 TO 6.0 WEIGHT PERCENT NON-VOLATILE CONCENTRATED STRONG ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, PHOSPHORIC ACID AND ORGANIC SUBSTITUTED DERIVATIVES THEREOF CONTAINING AT LEAST ONE ACIDIC HYDROGEN ATOM TO A TEMPERATURE BETWEEN 90 AND 225*F. TO YEILD PURE ISOBUTYLENE AND A C2 TO C18 HYDROCARBYL MONOCARBOXYLIC ACID, AND SEPARATING SAID ISOBUTYLENE AS A DISTILLATE FROM SAID ACID.
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING PURE ISOBUTYLENE WHICH COMPRISES HEATING A T-BUTYL ESTER OF A HYDROCARBYL MONOCARBOXYLIC ACID CONTAINING 2-18 CARBON ATOMS IN THE PRESENCE OF 0.05 TO 6.0 WEIGHT PERCENT NON-VOLATILE CONCENTRATED STRONG ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, PHOSPHORIC ACID AND ORGANIC SUBSTITUTED DERIVATIVES THEREOF CONTAINING AT LEAST ONE ACIDIC HYDROGEN ATOM TO A TEMPERATURE BETWEEN 90 AND 225*F. TO YEILD PURE ISOBUTYLENE AND A C2 TO C18 HYDROCARBYL MONOCARBOXYLIC ACID, AND SEPARATING SAID ISOBUTYLENE AS A DISTILLATE FROM SAID ACID.
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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |