US3872052A
Expired / Lapsed
US
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Polypropylene composition
Assignee: Standard Oil Co
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Filing: 1974-01-25
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Granted: 1975-03-18
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Expires: 1994-01-25
Abstract
Abstract Compositions of improved stiffness comprising resinous polymer of propylene and acicular hydrated sodium aluminum carbonate.
Inventors
- 👤 Ivor R Fielding
- 👤 Wassily Poppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:47
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/14; C08L23/142; C08L23/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
A COMPOSITION HAVING IMPROVED STIFFNESS COMPRISING A RESINOUS POLYMER OF PROPYLENE AND AN ACICULAR HYDRATED SODIUM ALUMINUM CARBONATE IN A CONCENTRATION OF 1 TO 25 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT RESINOUS POLYMER OF PROPYLENE, WHEREIN SAID HYDRATED SODIUM ALUMINUM CARBONATE HAS A RATIO OF LENGTH TO DIAMETER OF AT LEAST 25:1.
Claim 2
Dependent Claim
54 words
A COMPOSITION HAVING IMPROVED STIFFNESS COMPRISING A RESINOUS POLYMER OF PROPYLENE AND AN ACICULAR HYDRATED SODIUM ALUMINUM CARBONATE IN A CONCENTRATION OF 1 TO 25 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT RESINOUS POLYMER OF PROPYLENE, WHEREIN SAID HYDRATED SODIUM ALUMINUM CARBONATE HAS A RATIO OF LENGTH TO DIAMETER OF AT LEAST 25:1.
Claim 3
Dependent Claim
16 words
The composition of claim 1, wherein said resinous polymer of propylene comprises a homopolymer of propylene.
Claim 4
Dependent Claim
12 words
The composition of claim 2, wherein said composition comprises an impact modifier.
Claim 5
Dependent Claim
13 words
The composition of claim 3, wherein said impact modifier comprises an ethylene-propylene rubber.
Claim 6
Dependent Claim
13 words
The composition of claim 4, wherein said ethylene-propylene rubber is an ethylene-propylene-diene rubber.
Claim 7
Dependent Claim
25 words
The composition of claim 1, wherein said resinous polymer of propylene comprises a copolymer of propylene and ethylene containing at least 75% by weight propylene.
Claim 8
Dependent Claim
12 words
The composition of claim 6, wherein said composition comprises an impact modifier.
Claim 9
Dependent Claim
13 words
The composition of claim 7, wherein said impact modifier comprises an ethylene-propylene rubber.
References Cited (Backward Citations)
US2993799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |