US3846372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke retardant vinyl chloride polymer compositions
Assignee: North Carolina National Bank NCNB
•
Filing: 1973-04-19
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Granted: 1974-11-05
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Expires: 1993-04-19
Abstract
Abstract Vanadium 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 V2O5.
Inventors
- 👤 L Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:05
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
AS A COMPOSITION OF MATTER, A POLYVINYL HALIDE ADMIXED WITH A SMOKE RETARDANT AMOUNT OF A VANDIUM OXIDE.
Claim 2
Dependent Claim
18 words
AS A COMPOSITION OF MATTER, A POLYVINYL HALIDE ADMIXED WITH A SMOKE RETARDANT AMOUNT OF A VANDIUM OXIDE.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein said polyvinyl halide is polyvinyl chloride.
Claim 4
Dependent Claim
11 words
The composition of claim 1 wherein said oxide is vanadium pentoxide.
Claim 5
Dependent Claim
35 words
The composition of claim 1 wherein a vanadium oxide is present in an amount of from about 0.5 to about 40 parts by weight per each 100 part by weight portion of said polyvinyl halide.
Claim 6
Dependent Claim
17 words
As a composition of matter, a polyvinyl halide admixed with a smoke retardant amount of vanadium acetonyl-acetonate.
Claim 7
Dependent Claim
17 words
As a composition of matter, a polyvinyl halide admixed with a smoke retardant amount of vanadium acetonyl-acetonate.
References Cited (Backward Citations)
US3326832A
Cited
US3474464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |