Patent US2646437A successfully refreshed from Google Patents.
US2646437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing isopropenyl
Assignee: —
•
Filing: 1950-03-23
•
Granted: 1953-07-21
•
Expires: 1970-03-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:15
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PREPARING ISOPROPENYL ESTERS FROM FATTY MONOCARBOXYLIC ACIDS CONTAINING FROM 3 TO 18 CARBON ATOMS COMPRISING REACTING ISOPROPENYL ACETATE WITH THE SAID CARBOXYLIC ACID, AT A TEMPERATURE OF FROM 20* TO 100* C., IN THE PRESENCE OF A MERCURY COMPOUND SELECTED FROM THE GROUP CONSISTING OF MERCURIC OXIDE AND A MERCURIC SALT OF A SATURATED FATTY ACID AND IN THE PRESENCE OF A MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND PHOSPHORIC ACID, AND SEPARATING THE ISOPROPENYL ESTER WHICH FORMS.
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING ISOPROPENYL ESTERS FROM FATTY MONOCARBOXYLIC ACIDS CONTAINING FROM 3 TO 18 CARBON ATOMS COMPRISING REACTING ISOPROPENYL ACETATE WITH THE SAID CARBOXYLIC ACID, AT A TEMPERATURE OF FROM 20* TO 100* C., IN THE PRESENCE OF A MERCURY COMPOUND SELECTED FROM THE GROUP CONSISTING OF MERCURIC OXIDE AND A MERCURIC SALT OF A SATURATED FATTY ACID AND IN THE PRESENCE OF A MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND PHOSPHORIC ACID, AND SEPARATING THE ISOPROPENYL ESTER WHICH FORMS.
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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |