US3859211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water clarification with nitrogen-heterocyclic phosphonic acids
Assignee: Baker Petrolite LLC
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Filing: 1971-08-26
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Granted: 1975-01-07
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Expires: 1991-08-26
Abstract
Abstract Process for water clarification by adding to water containing suspended matter nitrogen heterocyclic phosphonic acids and derivatives thereof characterized by aminomethyl (or substituted methyl) phosphonic acids or derivatives thereof bonded directly or indirectly, i.e., through a N-side chain to the nitrogen atom in the heterocyclic ring, for example those containing in the molecule at least one of the following units: WHERE /N represents a heterocyclic ring having a nitrogen atom on the ring; -R''N- represents an amino-terminated side chain attached directly to the ring nitrogen (which side chain may or may not be present); and REPRESENTS A METHYL (OR SUBSTITUTED METHYL) PHOSPHONIC ACID GROUP WHERE M is hydrogen, an alcohol or a salt moiety, and X and Y are hydrogen or a substituted group such as alkyl, aryl, etc., of which one or two units may be present depending on the available nitrogen bonded hydrogens.
Inventors
- 👤 Derek Redmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:44
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1676; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C02F1/542; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/16; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/547; C07F9/645; C07F9/6503; C07F9/6506; C07F9/6527; C07F9/6533; C07F9/6558; C07F9/65583; C12; C12H; C12H1/00; C12H1/02; C12H1/04; C12N; C12N1/00; C12N1/02; C23F14/00; C23F14/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
68 words
A PROCESS OF WATER CLARIFICATION COMPRISING THE STEP OF ADDING TO WATER CONTAINING SUSPENDED MATTER NITROGENHETEROCYCLIC PHOSPHONIC ACIDS AND DERIVATIVES THEREOF CHARACTERIZED BY AT LEAST ONE AMINOMETHYL, OR AMINOSUBSTITUTED METHYL, PHOSPHONIC ACID GROUP OR A DERIVATIVE THEREOF, BONDED DIRECTLY, OR INDIRECTLY THROUGH A N-SIDE CHAIN, TO THE NITROGEN ATOM OF THE HETEROCYCLIC RING SELECTED FROM THE GROUP CONSISTING OF AN IMIDAZOLINE, A TETRAHYDROPYRIMIDINE, A PIPERAZINE, A MORPHOLINE AND
Claim 2
Dependent Claim
68 words
A PROCESS OF WATER CLARIFICATION COMPRISING THE STEP OF ADDING TO WATER CONTAINING SUSPENDED MATTER NITROGENHETEROCYCLIC PHOSPHONIC ACIDS AND DERIVATIVES THEREOF CHARACTERIZED BY AT LEAST ONE AMINOMETHYL, OR AMINOSUBSTITUTED METHYL, PHOSPHONIC ACID GROUP OR A DERIVATIVE THEREOF, BONDED DIRECTLY, OR INDIRECTLY THROUGH A N-SIDE CHAIN, TO THE NITROGEN ATOM OF THE HETEROCYCLIC RING SELECTED FROM THE GROUP CONSISTING OF AN IMIDAZOLINE, A TETRAHYDROPYRIMIDINE, A PIPERAZINE, A MORPHOLINE AND
Claim 3
Dependent Claim
14 words
The process of claim 1 where the nitrogen-heterocyclic phosphonic acid has the following formula:
Claim 4
Dependent Claim
9 words
The process of claim 2 where N represents imidazoline.
Claim 5
Dependent Claim
9 words
The process of claim 2 where N represents piperazine.
Claim 6
Dependent Claim
9 words
The process of claim 2 where N represents morpholine.
Claim 7
Dependent Claim
13 words
The process of claim 3 whEre the nitrogen-heterocyclic phosphonic acid has the formula
Claim 8
Dependent Claim
13 words
The process of claim 6 where R is C7H15 and M is hydrogen.
Claim 9
Dependent Claim
13 words
The process of claim 3 wherein the nitrogen-heterocyclic phosphonic acid has the formula
Claim 10
Dependent Claim
9 words
The process of claim 8 where R is C17H35.
Claim 11
Dependent Claim
13 words
The process of claim 3 wherein the nitrogen-heterocyclic phosphonic acid has the formula
Claim 12
Dependent Claim
9 words
The process of claim 10 where R is C17H35.
Claim 13
Dependent Claim
18 words
The process of claim 4 wherein the nitrogen-heterocyclic phosphonic acid is a member of the group consisting of
Claim 14
Dependent Claim
11 words
The process of claim 12 wherein the nitrogen-heterocyclic phosphonic acid is
Claim 15
Dependent Claim
14 words
The process of claim 12 wherein the nitrogen-heterocyclic phosphonic acid is a mixture of
Claim 16
Dependent Claim
18 words
The process of claim 5 wherein the nitrogen-heterocyclic phosphonic acid is a member of the group consisting of
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |