US2513504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters
Assignee: Celanese Corp
•
Filing: 1947-06-28
•
Granted: 1950-07-04
•
Expires: 1967-06-28
Abstract
No abstract record available.
Inventors
- 👤 Samuel B Mcfarlane
- 👤 Lomartire John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:11
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/02; C07C69/22; C07C69/62; C07C69/63
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
PROCESS FOR THE PRODUCTION OF CHLOROBUTYL ESTERS OF CARBOXYLIC ACIDS, WHICH COMPRISES REACTING A MIXTURE OF A CARBOXYLIC ACID, PHOSPHORUS TRICHLORIDE AND TETRAHYDROFURAN IN THE PRESENCE OF ZINC CHLORDE AS CATALYST.
Claim 2
Dependent Claim
31 words
PROCESS FOR THE PRODUCTION OF CHLOROBUTYL ESTERS OF CARBOXYLIC ACIDS, WHICH COMPRISES REACTING A MIXTURE OF A CARBOXYLIC ACID, PHOSPHORUS TRICHLORIDE AND TETRAHYDROFURAN IN THE PRESENCE OF ZINC CHLORDE AS CATALYST.
References Cited (Backward Citations)
US2314454A
Cited
US2424184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |