US3742047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of acid chlorides
Assignee: Monsanto Co
•
Filing: 1969-10-27
•
Granted: 1973-06-26
•
Expires: 1989-10-27
Abstract
Abstract A process for the preparation of carboxylic acid chlorides and more specifically, the preparation of Alpha -chloro acetyl chloride utilizing trichloroethylene as the starting compound. Carboxylic acid chlorides are useful compounds as intermediates in organic processes for the preparation of herbicides having an Alpha -chloroacetyl moiety.
Inventors
- 👤 E Prill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:56
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/58; C07C51/60
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
16 words
A process in accordance with claim 1 in which R1 is alkyl and R2 is hydrogen.
Claim 2
Dependent Claim
16 words
A process in accordance with claim 1 in which R1 is hydrogen and R2 is chlorine.
Claim 3
Dependent Claim
12 words
A process in accordance with claim 3 in which R3 is hydroxyl.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |