US4190615A
Expired / Lapsed
US
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Oligomeric ester chain condensates of substituted 1-hydroxy-1,1-diphosphonic acid
Assignee: Veolia WTS USA Inc
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Filing: 1978-09-11
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Granted: 1980-02-26
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Expires: 1998-09-11
Abstract
Abstract Phosphonic acid ester condensate oligomers are disclosed which are oligomeric ester condensates of alkyl-1-hydroxy-1,1-diphosphonic acid having the formula: <IMAGE> where R1 and R2 each represent a group having the formula CxH2x+1, where x is from 6 to 13; Y is <IMAGE> or hydrogen; M is a water soluble cation such as Na, K or NH4, and n is 1 or greater. The use of these materials as reverse emulsion breakers is also disclosed, as is a method for their preparation.
Inventors
- 👤 Larry W. Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:18
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/04; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3839; C07F9/386; C07F9/40; C07F9/4071; C07F9/4075
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
A compound having the formula ##STR15## where M is a water soluble cation; R 1 and R 2 each represent a group having the formula C x H 2x+1 ; x is from 6 to and including 13; Y is ##STR16## or hydrogen; and n is 1 or greater.
Claim 2
Dependent Claim
49 words
A compound having the formula ##STR15## where M is a water soluble cation; R 1 and R 2 each represent a group having the formula C x H 2x+1 ; x is from 6 to and including 13; Y is ##STR16## or hydrogen; and n is 1 or greater.
Claim 3
Dependent Claim
15 words
A compound according to claim 1, wherein n is from about 1 to about 16.
Claim 4
Dependent Claim
22 words
A compound according to claim 2, wherein M is selected from the group consisting of hydrogen, sodium, potassium, ammonium and ammonium salts.
Claim 5
Dependent Claim
15 words
A compound according to claim 3, wherein x is from 7 to and including 11.
Claim 6
Dependent Claim
14 words
A compound according to claim 4, wherein x is 7 and Y is hydrogen.
References Cited (Backward Citations)
US3214454A
Cited
US3621081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |