US4248929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter media coated with flame resistant compositions
Assignee: Solutia Inc
•
Filing: 1979-10-24
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Granted: 1981-02-03
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Expires: 1999-10-24
Abstract
Abstract Flame resistant articles suitable for filtering solids and liquids from gases comprising a solid filter media, e.g., fiberglass, coated with flame resistant compositions containing liquid aromatic phosphate or polycarboxylate esters and a particulate inorganic phosphate.
Inventors
- 👤 Albert W. Morgan
- 👤 Roland G. Ribaudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:37
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/268
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
148 words
An article of manufacture suitable for filtering solids or liquids from a gas and comprising solid filter media at least partially coated with a sprayable, flame resistant gel composition consisting essentially of from about 50 to about 99% normally liquid essentially halogen-free aromatic ester selected from the group consisting of phosphate and polycarboxylate and mixtures thereof and, substantially uniformly dispersed throughout said ester, from about 1 to about 50% finely divided inorganic phosphate, wherein said inorganic phosphate is essentially ammonium phosphate and has an average particle size from about 0.5 to about 40 microns, said aromatic phosphate is selected from di(C 4 -C 20 alkyl)aryl, C 4 -C 20 alkyl diaryl and triaryl phosphates in which each aryl radical is unsubstituted phenyl or C 1 -C 12 alkylphenyl, and said polycarboxylate is selected from di(C 1 -C 20 alkyl), C 1 -C 20 alkyl benzyl and dibenzyl phthalates.
Claim 2
Dependent Claim
148 words
An article of manufacture suitable for filtering solids or liquids from a gas and comprising solid filter media at least partially coated with a sprayable, flame resistant gel composition consisting essentially of from about 50 to about 99% normally liquid essentially halogen-free aromatic ester selected from the group consisting of phosphate and polycarboxylate and mixtures thereof and, substantially uniformly dispersed throughout said ester, from about 1 to about 50% finely divided inorganic phosphate, wherein said inorganic phosphate is essentially ammonium phosphate and has an average particle size from about 0.5 to about 40 microns, said aromatic phosphate is selected from di(C 4 -C 20 alkyl)aryl, C 4 -C 20 alkyl diaryl and triaryl phosphates in which each aryl radical is unsubstituted phenyl or C 1 -C 12 alkylphenyl, and said polycarboxylate is selected from di(C 1 -C 20 alkyl), C 1 -C 20 alkyl benzyl and dibenzyl phthalates.
Claim 3
Dependent Claim
54 words
An article of manufacture of claim 1 wherein the aromatic phosphate is C 6 -C 12 alkyl diaryl phosphate in which each aryl radical is unsubstituted phenyl or C 1 -C 8 alkylphenyl and, of the combined weight of said inorganic phosphate and said ester, from about 10 to about 40% is inorganic phosphate.
Claim 4
Dependent Claim
39 words
An article of manufacture of claim 1 wherein the polycarboxylate is selected from C 4 -C 12 alkyl benzyl phthalates and, of the combined weight of said inorganic phosphate and said ester, at least about 50% is aromatic phosphate.
Claim 5
Dependent Claim
15 words
An article of manufacture of claim 1 wherein the inorganic phosphate is essentially diammonium phosphate.
Claim 6
Dependent Claim
31 words
An article of manufacture of claim 4 wherein the combined weight of said inorganic phosphate and said ester is from about 55 to about 100% of the weight of said composition.
Claim 7
Dependent Claim
21 words
An article of manufacture of claim 5 having a substantial hydrocarbon content up to about 45% by weight of said composition.
Claim 8
Dependent Claim
25 words
An article of manufacture of claim 1 containing from about 15 to about 30% diammonium phosphate, at least about 5% of said ester being phosphate.
Claim 9
Dependent Claim
20 words
An article of manufacture of claim 7 wherein the polycarboxylate is selected from C 4 -C 12 alkyl benzyl phthalates.
Claim 10
Dependent Claim
15 words
An article of manufacture of claim 8 wherein the polycarboxylate is predominantly butyl benzyl phthalate.
Claim 11
Dependent Claim
17 words
An article of manufacture of claim 1 wherein at least about 50% of said ester is phosphate.
Claim 12
Dependent Claim
15 words
An article of manufacture of claim 10 wherein essentially all of said ester is phosphate.
Claim 13
Dependent Claim
73 words
An article of manufacture of claim 10 consisting essentially of from about 15 to about 30% diammonium phosphate and from about 70 to about 85% of said ester, at least about 50% of said ester being selected from C 6 -C 12 alkyl diaryl and triaryl phosphates in which each aryl radical is unsubstituted phenyl or C 1 -C 8 alkylphenyl, said polycarboxylate being selected from C 4 -C 12 alkyl benzyl phthalates.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |