Patent US3940424A successfully refreshed from Google Patents.
US3940424A
Expired / Lapsed
US
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Lactones
Assignee: Monsanto Co
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Filing: 1973-12-19
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Granted: 1976-02-24
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Expires: 1993-12-19
Abstract
Abstract Compounds represented by the formula OO ANGLE C ¦¦ Rx-C-Q ¦ COOR and salts thereof represented by the formula COOM ¦ HO-Rx-C-OH ¦ COOM wherein Q is bromine, chlorine, -O-alkali metal or OH; R is hydrogen or an alkyl group containing from 1 to 20 carbon atoms; M is alkali metal; and Rx is (CH2)n -CH-CH- , n being an integer from 4 to 10, or RzRz ¦¦ -C-C- ¦¦ RzRz Rz being hydrogen, alkyl phenyl alkyl, alkoxy alkyl, alkoxy phenyl, alkoxy phenyl alkyl or -COOX, X being R or M, are useful as intermediates for the preparation of sequestrants.
Inventors
- 👤 Kent P. Lannert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:20
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A compound represented by the formula ##EQU42## wherein: Q is selected from the group consisting of bromine, chlorine, --O-alkali metal and --OH; R is selected from the group consisting of hydrogen and alkyl groups containing from 1 to 20 carbon atoms, provided, that when Q is --O-alkali metal, bromine or chlorine, R is an alkyl group; and, Rx is ##EQU43## Rz being hydrogen, alkyl, phenyl alkyl, alkoxy alkyl, alkoxy phenyl, alkoxy phenyl alkyl, and COOR; the total number of carbon atoms in Rx being from 2 to 22.
Claim 2
Dependent Claim
88 words
A compound represented by the formula ##EQU42## wherein: Q is selected from the group consisting of bromine, chlorine, --O-alkali metal and --OH; R is selected from the group consisting of hydrogen and alkyl groups containing from 1 to 20 carbon atoms, provided, that when Q is --O-alkali metal, bromine or chlorine, R is an alkyl group; and, Rx is ##EQU43## Rz being hydrogen, alkyl, phenyl alkyl, alkoxy alkyl, alkoxy phenyl, alkoxy phenyl alkyl, and COOR; the total number of carbon atoms in Rx being from 2 to 22.
Claim 3
Dependent Claim
9 words
A compound of claim 1 wherein Q is Br.
Claim 4
Dependent Claim
9 words
A compound of claim 1 wherein Q is ONa.
Claim 5
Dependent Claim
11 words
A compound of claim 1 wherein Rx is --CH.sub.2 --CH.sub.2 --
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |