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US3758569A
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Preparation of monohaloacetyl halides
Assignee: Monsanto Co
•
Filing: 1972-08-04
•
Granted: 1973-09-11
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Expires: 1992-08-04
Abstract
Abstract A process for the preparation of monohaloacyl halides by halogenating ketenes in the presence of a lactone.
Inventors
- 👤 D Bissing
- 👤 V Gash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:08
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/04; C07C49/16; C07C51/00; C07C51/58
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
13 words
A process in accordance with claim 1 wherein a, b and c are
Claim 2
Dependent Claim
17 words
A process in accordance with claim 1 wherein a and b are 1, and c is 0.
Claim 3
Dependent Claim
17 words
A process in accordance with claim 1 wherein a is 1, and b and c are 0.
Claim 4
Dependent Claim
14 words
A process in accordance with claim 1 wherein a, b and c are 0.
Claim 5
Dependent Claim
21 words
A process in accordance with claim 1 wherein R, R1, R2, R3, R4, R5, R6, R7, R8 and R9 are hydrogen.
Claim 6
Dependent Claim
12 words
A process in accordance with claim 1 wherein the lactone is gamma-butyrolactone.
Claim 7
Dependent Claim
16 words
A process in accordance with claim 1 wherein the lactone is gamma-butyrolactone and halogen is chlorine.
Claim 8
Dependent Claim
17 words
A process in accordance with claim 1 wherein the lactone is gamma-butyrolactone and the halogen is bromine.
Claim 9
Dependent Claim
10 words
A process of claim 1 wherein the lactone is beta-propiolactone.
Claim 10
Dependent Claim
10 words
A process of claim 1 wherein the lactone is gamma-valerolactone.
Claim 11
Dependent Claim
10 words
The process of claim 1 wherein the lactone is epsilon-caprolactone.
Claim 12
Dependent Claim
10 words
The process of claim 1 wherein the lactone is alpha-butyl-gamma-butyrolactone.
Claim 13
Dependent Claim
10 words
The process of claim 1 wherein the lactone is beta-chloro-gamma-butyrolactone.
Claim 14
Dependent Claim
10 words
The process of claim 1 wherein the lactone is beta-phenyl-gamma-butyrolactone.
Claim 15
Dependent Claim
10 words
The process of claim 1 wherein the lactone is beta-(para-tolyl)-gamma-butyrolactone.
Claim 16
Dependent Claim
11 words
A process of claim 1 wherein the ketene is unsubstituted ketene.
Claim 17
Dependent Claim
10 words
A process of claim 17 wherein the halogen is chlorine.
References Cited (Backward Citations)
US2862964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |