US3905927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dustless free-flowing lead stabilizer compositions for polyvinyl chloride
Assignee: Wyeth Holdings LLC
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Filing: 1973-06-21
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Granted: 1975-09-16
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Expires: 1993-06-21
Abstract
Abstract Dustless free-flowing lead stabilizing compositions for use in polyvinyl chloride are disclosed which comprise an intimate mixture of a major proportion of lead stabilizer compound, a minor proportion of polyvinyl chloride resin, a small proportion of plasticizer, and a small proportion of organic lubricant.
Inventors
- 👤 Robert Frederick Anderson
- 👤 Bojan Terzic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K3/00; C08K3/10; C08K3/11; C08K3/18; C08K3/24; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
AN IMPROVED DUSTLESS, FREE-FLOWING LEAD STABILIZING COMPOSITION FOR INCORPORATION INTO POLYVINYL CHLORIDE COMPRISING ANINTIMATE MIXTURE OF, BY WEIGHT, 60 TO 90% OF A LEAD STABILIZING COMPOUND, 5 TO 35% OF A POLYVINYL CHLORIDE RESIN, 0.1 TO 20% OF A PLASTICIZER, AND 0.5 TO 15% OF A LUBRICANT.
Claim 2
Dependent Claim
47 words
AN IMPROVED DUSTLESS, FREE-FLOWING LEAD STABILIZING COMPOSITION FOR INCORPORATION INTO POLYVINYL CHLORIDE COMPRISING ANINTIMATE MIXTURE OF, BY WEIGHT, 60 TO 90% OF A LEAD STABILIZING COMPOUND, 5 TO 35% OF A POLYVINYL CHLORIDE RESIN, 0.1 TO 20% OF A PLASTICIZER, AND 0.5 TO 15% OF A LUBRICANT.
Claim 3
Dependent Claim
21 words
A composition as defined in claim 1 wherein said lead stabilizing compound is a basic lead salt of an inorganic acid.
Claim 4
Dependent Claim
26 words
A composition as defined in claim 1 wherein said lubricant is a higher fatty acid of about 8 to 22 carbon atoms or a salt thereof.
Claim 5
Dependent Claim
39 words
A composition as defined in claim 1 wherein the proportions of the ingredients are, by weight, 75 to 85% of lead stabilizing compound, 10 to 20% of polyvinyl chloride resin, 2 to 15% plasticizer, and 1 to 3% lubricant.
Claim 6
Dependent Claim
31 words
A composition as defined in claim 4 wherein the plasticizer is dioctyl phthalate, the lubricant is calcium stearate, and the lead stabilizing compound is a basic lead sulfate, phthalate, or carbonate.
Claim 7
Dependent Claim
19 words
A composition as defined in claim 1 wherein said lead stabilizing compound is a lead salt of phthalic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |