US3903028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke retardant compositions
Assignee: North Carolina National Bank NCNB
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Filing: 1974-06-07
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Granted: 1975-09-02
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Expires: 1994-06-07
Abstract
Abstract Iron oxide admixed with copper or molybdenum compounds, impart smoke retardant properties to combustible materials such as plastics. Thus for example, polyvinyl chloride does not emit as much smoke during combustion when it is compounded with Fe2O3, MoO3, and Cu2O.
Inventors
- 👤 Lawrence C Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:44
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
66 words
IN A COMPOSITION CONSISTING ESSENTIALLY OF PLASTICIZED POLYVINYL HALIDE RESIN WITH A STABILIZER AND LUBRICANT, THE IMPROVEMENT COMPRISING ADDITION OF FROM ABOUT 0.5 TO ABOUT 40 PARTS BY WEIGHT PER HUNDRED PARTS BY WEIGHT POLYVINYL HALIDE RESIN OF A SMOKE RETARDANT ADDITIVE MIXTURE CONSISTING ESSENTIALLY OF IRON OXIDE AND MOLYBDENUM OXIDE WHEREIN THE AMOUNT OF EACH OXIDE IN SAID MIXTURE IS FROM 25-75 PARTS BY WEIGHT.
Claim 2
Dependent Claim
66 words
IN A COMPOSITION CONSISTING ESSENTIALLY OF PLASTICIZED POLYVINYL HALIDE RESIN WITH A STABILIZER AND LUBRICANT, THE IMPROVEMENT COMPRISING ADDITION OF FROM ABOUT 0.5 TO ABOUT 40 PARTS BY WEIGHT PER HUNDRED PARTS BY WEIGHT POLYVINYL HALIDE RESIN OF A SMOKE RETARDANT ADDITIVE MIXTURE CONSISTING ESSENTIALLY OF IRON OXIDE AND MOLYBDENUM OXIDE WHEREIN THE AMOUNT OF EACH OXIDE IN SAID MIXTURE IS FROM 25-75 PARTS BY WEIGHT.
Claim 3
Dependent Claim
70 words
In a composition consisting essentially of a plasticized polyvinyl halide resin with a stabilizer and lubricant, the improvement comprising addition of from about 0.5 to about 40 parts by weight per hundred parts by weight polyvinyl halide resin of a smoke retardant additive mixture consisting essentially of Fe2O3, Cu2O, and MoO3 wherein the amount of each oxide in said mixture is from about 10 to about 80 parts by weight.
Claim 4
Dependent Claim
70 words
In a composition consisting essentially of a plasticized polyvinyl halide resin with a stabilizer and lubricant, the improvement comprising addition of from about 0.5 to about 40 parts by weight per hundred parts by weight polyvinyl halide resin of a smoke retardant additive mixture consisting essentially of Fe2O3, Cu2O, and MoO3 wherein the amount of each oxide in said mixture is from about 10 to about 80 parts by weight.
Claim 5
Dependent Claim
11 words
The composition of claim 1 wherein said iron oxide is Fe2O3.
Claim 6
Dependent Claim
11 words
A composition of claim 1 wherein said molybdenum oxide is MoO3.
Claim 7
Dependent Claim
25 words
A polyvinyl chloride of claim 2 wherein the amount of each oxide in said mixture is from about 20 to about 40 parts by weight.
Claim 8
Dependent Claim
12 words
The composition of claim 1 wherein said polyvinyl halide is polyvinyl chloride.
References Cited (Backward Citations)
US2286744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |