Patent US2899446A successfully refreshed from Google Patents.
US2899446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in the process of preparing
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:34
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
IN THE PROCESS FOR PREPARING ENDRIN FROM ISODRIN BY EPOXIDIZING ISODRIN WITH AN ORGANIC PER-ACID, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID EPOXIDATION REACTION IN A REACTION MIXTURE CONTAINING DIPICOLINIC ACID.
Claim 2
Dependent Claim
30 words
IN THE PROCESS FOR PREPARING ENDRIN FROM ISODRIN BY EPOXIDIZING ISODRIN WITH AN ORGANIC PER-ACID, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID EPOXIDATION REACTION IN A REACTION MIXTURE CONTAINING DIPICOLINIC ACID.
References Cited (Backward Citations)
US2768181A
Cited
US2768178A
Cited
US2768180A
Cited
US2768179A
Cited
US2676132A
Cited
US2776301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |