Patent US4085134A successfully refreshed from Google Patents.
US4085134A
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Amino-phosphonic-sulfonic acids
Assignee: Baker Petrolite LLC
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Filing: 1974-02-15
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Granted: 1978-04-18
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Expires: 1994-02-15
Abstract
Abstract This invention relates to compounds characterized by the presence of N-methyl, or substituted methyl, phosphonic acid and N-propylenesulfonic acid groups. These compounds contain at least one or more of each group and are bonded to the same or different amino groups. They are derived by reacting an amine with both propane sultone and with a carbonyl compound, such as formaldehyde, and phosphorous acid or its equivalent. They have a wide variety of uses, for example as scale and corrosion inhibitors, chelating agents, etc.
Inventors
- 👤 Derek Redmore
- 👤 Frederick T. Welge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:50
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A compound which is an amine containing the following nitrogen-bonded groups: ##STR42## where R and R' are hydrogen or an alkyl or aryl group and M is hydrogen or a salt moiety, the nitrogen to which the groups are bonded being amino nitrogen of the amine, the salt moiety being an alkali metal, an alkaline earth metal, ammonium or ammonium form of an amine, the compound in acid form having the ##STR43## as the sole acidic groups, the compound with hydrogen in place of said groups being an amine in which said nitrogen is amino nitrogen.
Claim 2
Dependent Claim
96 words
A compound which is an amine containing the following nitrogen-bonded groups: ##STR42## where R and R' are hydrogen or an alkyl or aryl group and M is hydrogen or a salt moiety, the nitrogen to which the groups are bonded being amino nitrogen of the amine, the salt moiety being an alkali metal, an alkaline earth metal, ammonium or ammonium form of an amine, the compound in acid form having the ##STR43## as the sole acidic groups, the compound with hydrogen in place of said groups being an amine in which said nitrogen is amino nitrogen.
Claim 3
Dependent Claim
35 words
The compound of claim 1 where the --(CH 2 ) 3 SO 3 M and ##STR44## groups are bonded to the same nitrogen atom, where M is hydrogen, alkali metal, alkaline earth metal or ammonium.
Claim 4
Dependent Claim
15 words
The compound of claim 2 of the formula ##STR45## where R is a hydrocarbon group.
Claim 5
Dependent Claim
43 words
The compound of claim 1 where the compound has at least 2 nitrogen atoms, all of the valences of the nitrogen atoms of the compound being attached to carbon or hydrogen, and where M is hydrogen, alkali metal, alkaline earth metal or ammonium.
Claim 6
Dependent Claim
58 words
The compound of claim 4 where the compound has the formula ##STR46## where n=1-4, where the nitrogen valences are joined to hydrogen, (CH 2 ) 3 SO 3 M or ##STR47## with the proviso that that compound contain at least one --(CH 2 ) 3 SO 3 M and at least one ##STR48## and where A is alkylene.
Claim 7
Dependent Claim
28 words
The compound of claim 5 where in at least one instance the --(CH 2 ) 3 SO 3 M and ##STR49## groups are bonded to the same nitrogen.
Claim 8
Dependent Claim
12 words
The compound of claim 5 where the compound contains no nitrogen-bonded hydrogens.
Claim 9
Dependent Claim
14 words
The compound of claim 6 which is derived from ethylene diamine or ethylene triamine.
Claim 10
Dependent Claim
9 words
The compound of claim 8 having the formula ##STR50##
Claim 11
Dependent Claim
9 words
The compound of claim 8 having the formula ##STR51##
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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |