US2727042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diastereoisomeric oxazolines and proc-
Assignee: —
•
Filing: —
•
Granted: 1955-12-13
•
Expires: 1972-12-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:54
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/08; C07D263/10; C07D263/14; C07D261/00; C07D261/02; C07D261/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
THE THREO FORMS OF 2-DICHLOROMETHYL-4-CHLOROMETHLY-5-P-NITROPHENYL-*2-OXAZOLINE.
Claim 2
Dependent Claim
5 words
THE THREO FORMS OF 2-DICHLOROMETHYL-4-CHLOROMETHLY-5-P-NITROPHENYL-*2-OXAZOLINE.
Claim 3
Dependent Claim
42 words
A PROCESS FOR THE PREPARATION OF DL-THREO 2-DICHLOROMETHYL - 4 - CHLOROMETHYL-5-P-NITROPHENYL-*2-OXAZOLINE WHICH COMPRISES THE CYCLIZATION OF DL-THREO 2-DICHLORACETAMIDO-1-NITROPHENYL - 1,3 - DICHLORAOPROPANE BY TREATMENT WITH A DILUTE AQUEOUS SOLUTION OF AN ALKALI METAL HYDROXIDE AT A TEMPERATURE NOT OVER 40* C.
Claim 4
Dependent Claim
42 words
A PROCESS FOR THE PREPARATION OF DL-THREO 2-DICHLOROMETHYL - 4 - CHLOROMETHYL-5-P-NITROPHENYL-*2-OXAZOLINE WHICH COMPRISES THE CYCLIZATION OF DL-THREO 2-DICHLORACETAMIDO-1-NITROPHENYL - 1,3 - DICHLORAOPROPANE BY TREATMENT WITH A DILUTE AQUEOUS SOLUTION OF AN ALKALI METAL HYDROXIDE AT A TEMPERATURE NOT OVER 40* C.
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) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |