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US3674804A Expired / Lapsed US ⏱️ 0.0 years remaining

Imidazoline phosphonic acids

Assignee: Baker Petrolite LLC
•
Filing: 1968-10-17
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Granted: 1972-07-04
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Expires: 1988-10-17
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Abstract

Abstract 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 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, and to uses for these compounds, for example, as scale inhibitors, corrosion inhibitors, etc.

Inventors

  • 👤 Derek Redmore

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 08:04
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; 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; C07F9/3817; C07F9/547; C07F9/645; C07F9/6503; C07F9/6506; C07F9/6509; C07F9/650952; C07F9/6527; C07F9/6533; C07F9/6558; C07F9/65583; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/167; C23F11/1676; C23F14/00; C23F14/02; Y; Y10; Y10S; Y10S507/00; Y10S507/939

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 42 words
A nitrogen heterocyclic phosphonic acid of claim 1 of the formula where x is 0 or 1 and y is 1 or 2, with the proviso that x is 0 when y is 2 and x is 1 when y is 1.
Claim 2
Dependent Claim 11 words
A nitrogen heterocyclic phosphonic acid of claim 1 of the formula
Claim 3
Dependent Claim 11 words
A nitrogen heterocyclic phosphonic acid of claim 2 of the formula
Claim 4
Dependent Claim 11 words
A nitrogen heterocyclic phosphonic acid of claim 2 of the formula

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) 1975-07-04 1976-01-03 1976-07-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-07-04 1980-01-03 1980-07-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-07-04 1984-01-03 1984-07-04 $7700.00 Window Closed / Lapsed

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