US5342550A — Solid delivery systems for toilet tanks, urinals …

Claim 1

Independent Claim 244 words

A solid block, controlled release composition, consisting essentially of: a) from about 5 to about 40% by weight of a fatty alkanolamide having a carbon chain length of about 9 to about 18; b) from about 15 to about 60% by weight of at least one surfactant selected from the group consisting of: i) oxyalkylated primary aliphatic alcohols having the formula: CH.sub.3 (CH.sub.2).sub.n O(C.sub.2 H.sub.4 O).sub.m H wherein m is an integer which results in an alkyl chain whose length is from about 15 to about 17 carbon atoms and m is a number from about 27 to about 55, ii) block copolymer surfactants of the formula: ##STR6## having a molecular weight range of from about 7,700 to about 14,600 and being comprised of from about 70 to about 80 percent by weight oxyethylene wherein a has a value of from about 61 to about 133, b has a value of from about 39 to about 65, and c has a value of from about 61 to about 133, and iii) alkyl phenol ethoxylates of the formula: ##STR7## wherein R equals C 9 and x is from about 50 to about 100; c) from about 20 to about 70% by weight of at least one polyethylene glycol selected from the group consisting of polyethylene glycols having a molecular weight within the range of from about 1450 to about 8000; and d) from about 20 to about 50 percent of at least one binding agent.

Claim 2

Dependent Claim 244 words

A solid block, controlled release composition, consisting essentially of: a) from about 5 to about 40% by weight of a fatty alkanolamide having a carbon chain length of about 9 to about 18; b) from about 15 to about 60% by weight of at least one surfactant selected from the group consisting of: i) oxyalkylated primary aliphatic alcohols having the formula: CH.sub.3 (CH.sub.2).sub.n O(C.sub.2 H.sub.4 O).sub.m H wherein m is an integer which results in an alkyl chain whose length is from about 15 to about 17 carbon atoms and m is a number from about 27 to about 55, ii) block copolymer surfactants of the formula: ##STR6## having a molecular weight range of from about 7,700 to about 14,600 and being comprised of from about 70 to about 80 percent by weight oxyethylene wherein a has a value of from about 61 to about 133, b has a value of from about 39 to about 65, and c has a value of from about 61 to about 133, and iii) alkyl phenol ethoxylates of the formula: ##STR7## wherein R equals C 9 and x is from about 50 to about 100; c) from about 20 to about 70% by weight of at least one polyethylene glycol selected from the group consisting of polyethylene glycols having a molecular weight within the range of from about 1450 to about 8000; and d) from about 20 to about 50 percent of at least one binding agent.

Claim 3

Dependent Claim 56 words

The composition as claimed in claim 1, consisting essentially of: a) about 10 to about 20% by weight of said fatty alkanolamide; b) about 20 to about 30% by weight of said surfactant; c) about 25 to about 35% by weight of said polyethylene glycol; and d) about 20 to about 30% of said binding agent.

Claim 4

Dependent Claim 166 words

The composition as claimed in claim 2, wherein said alkanolamide is: ##STR8## wherein RCO represents the coconut acid radical and R equals C 12-14 and x equals 1 or 2, and said surfactant is selected from the group consisting of the compounds having the formula i) wherein n equals 17 and m equals 27 and the compound of formula i) wherein n equals 17 and m equals 55; the compounds of formula ii) wherein a equals 100, b equals 65 and c equals 100, a equals 133, b equals 50 and c equals 133, a equals 118, b equals 45 and c equals 118, a equals 103, b equals 39 and c equals 103, a equals 61, b equals 40 and c equals 61; and the compounds of formula iii) wherein R equals C 9 and x equals 50, R equals C 9 and x equals 70, R equals C 9 and x equals 100; and said polyethylene glycol has a molecular weight of about 8000.

Claim 5

Dependent Claim 43 words

The composition as claimed in claim 3, wherein said fatty alkanolamide is cocoalkanolamide, said surfactant is the compounds of formula ii) wherein a equals 100, b equals 65 and c equals 100, and said polyethylene glycol has a molecular weight of about 8000.

Claim 6

Dependent Claim 29 words

The composition as claimed in claim 4, wherein said composition has a dissolution rate for complete dissolution of at least about 6 hours per 0.50 grams of said composition.

Claim 7

Dependent Claim 29 words

The composition as claimed in claim 5, wherein said composition has a dissolution rate for complete dissolution of at least about 15 hours per 0.50 grams of said composition.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-08-29	1998-02-28	1998-08-30	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-08-29	2002-02-28	2002-08-30	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-08-29	2006-02-28	2006-08-30	$7700.00	Window Closed / Lapsed

Solid delivery systems for toilet tanks, urinals and condensate water

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag