US2518940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of glycol diesters of aromatic acids
Assignee: Shell Development Co
•
Filing: 1946-11-19
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Granted: 1950-08-15
•
Expires: 1966-11-19
Abstract
No abstract record available.
Inventors
- 👤 Frederick F Rust
- 👤 William E Vaughan
- 👤 Frank H Seubold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:27
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/76; C07C69/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE PRODUCTION OF GLYCOL DIESTERS WHICH COMPRISES, HEATING FOR NOT MORE THAN 100 HOURS AT A TEMPERATURE OF FROM 20*C. TO 200*C. AN AROMATIC ALDEHYDE, IN WHICH THE ALDEHYDE GROUP IS ATTACHED TO AN AROMATIC RING, IN CONTACT WITH A SOURCE OF FREE RADICALS FROM THE GROUP CONSISTING OF ACTINIC LIGHT AND ORGANIC PEROXIDES.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE PRODUCTION OF GLYCOL DIESTERS WHICH COMPRISES, HEATING FOR NOT MORE THAN 100 HOURS AT A TEMPERATURE OF FROM 20*C. TO 200*C. AN AROMATIC ALDEHYDE, IN WHICH THE ALDEHYDE GROUP IS ATTACHED TO AN AROMATIC RING, IN CONTACT WITH A SOURCE OF FREE RADICALS FROM THE GROUP CONSISTING OF ACTINIC LIGHT AND ORGANIC PEROXIDES.
References Cited (Backward Citations)
FR808897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |