US2870200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of unsaturated polycarboxylic acids and esters
Assignee: Shell Development Co
•
Filing: 1954-05-24
•
Granted: 1959-01-20
•
Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Morris S Kharasch
- 👤 Nudenberg Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:01
CPC Classifications
C; C07; C07C; C07C255/00; C07C57/00; C07C57/02; C07C57/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS OF PRODUCING A COMPOUND OF THE GROUP CONSISTING OF DIETHYLENIC POLYCARBOXYLIC ACIDS AND ESTERS THEREOF, WHICH COMPRISES TREATING A CYCLIC PEROXIDE COMPOUND HAVING 4 TO 10 CARBON ATOMS IN THE PRIMARY RING OF THE FORMULA
Claim 2
Dependent Claim
37 words
A PROCESS OF PRODUCING A COMPOUND OF THE GROUP CONSISTING OF DIETHYLENIC POLYCARBOXYLIC ACIDS AND ESTERS THEREOF, WHICH COMPRISES TREATING A CYCLIC PEROXIDE COMPOUND HAVING 4 TO 10 CARBON ATOMS IN THE PRIMARY RING OF THE FORMULA
References Cited (Backward Citations)
US2298405A
Cited
US2352461A
Cited
US2436269A
Cited
US2601223A
Cited
US2811551A
Cited
US2680713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |