Patent US6236674B1 successfully refreshed from Google Patents.
US4874819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer blend
Assignee: Shell USA Inc
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Filing: 1988-06-08
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Granted: 1989-10-17
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Expires: 2008-06-08
Abstract
Abstract Improved melt stability without the loss of properties of strength and impact resistance are exhibited by blends of (a) linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and (b) ethylene- alpha , beta -ethylenically unsaturated acid copolymer.
Inventors
- 👤 Eric R. George
- 👤 Robert G. Lutz
- 👤 Edgar J. Smutny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:06
CPC Classifications
C; C08; C08L; C08L73/00; C08L23/00; C08L23/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
A composition comprising a non-miscible blend of a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon of from 2 to 20 carbon atoms inclusive and an ethylene-α,β-ethylenically unsaturated carboxylic acid copolymer, said α,β-ethylenically unsaturated carboxylic acid having up to 10 carbon atoms, wherein the amount of said ethylene-α,β-ethylenically unsaturated carboxylic acid copolymer is 0.01% to 35% by weight based on the total blend.
Claim 2
Dependent Claim
68 words
A composition comprising a non-miscible blend of a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon of from 2 to 20 carbon atoms inclusive and an ethylene-α,β-ethylenically unsaturated carboxylic acid copolymer, said α,β-ethylenically unsaturated carboxylic acid having up to 10 carbon atoms, wherein the amount of said ethylene-α,β-ethylenically unsaturated carboxylic acid copolymer is 0.01% to 35% by weight based on the total blend.
Claim 3
Dependent Claim
49 words
The composition of claim 1 wherein the linear alternating polymer is represented by the formula --CO--CH 2 -CH 2 )] x [CO--B)] y wherein B is the moiety of an ethylenically unsaturated hydrocarbon of at least three carbon atoms and the ratio of y:x is no more than 0.5.
Claim 4
Dependent Claim
37 words
The composition of claim 2 wherein the α,β-unsaturated carboxylic acid has up to 4 carbon atoms and the copolymer is present in an amount from about 0.1% to about 35% by weight based on the total blend.
Claim 5
Dependent Claim
12 words
The composition of claim 3 wherein B is the moiety of propylene.
Claim 6
Dependent Claim
34 words
The composition of claim 4 wherein the α,β-unsaturated carboxylic acid is acrylic acid present in the copolymer in an amount from about 0.1% by weight to about 35% by weight based on total copolymer.
Claim 7
Dependent Claim
32 words
The composition of claim 4 wherein the α,β-unsaturated carboxylic acid is methacrylic acid present in the copolymer in an amount from about 0.1% to about 35% by weight based on total copolymer.
Claim 8
Dependent Claim
7 words
The composition of claim 3 wherein y=0.
Claim 9
Dependent Claim
13 words
The composition of claim 7 wherein the α,β-unsaturated carboxylic acid is methacrylic acid.
Claim 10
Dependent Claim
13 words
The composition of claim 7 wherein the α,β-unsaturated carboxylic acid is acrylic acid.
Claim 11
Dependent Claim
27 words
The composition of claim 1 wherein said copolymer is present in an amount of from about 0.5 to about 10% by weight based on the total blend.
Claim 12
Dependent Claim
26 words
The composition of claim 10 wherein said copolymer is present in an amount of from 1% to about 7% by weight based on the total blend.
Claim 13
Dependent Claim
31 words
The composition of claim 1 wherein said α,β-unsaturated carboxylic acid is present in said copolymer in an amount from about 0.1% to about 35% by weight based on the total copolymer.
Claim 14
Dependent Claim
31 words
The composition of claim 12 wherein said α,β-unsaturated carboxylic acid is present in said copolymer in an amount from about 1% to about 20% by weight based on the total copolymer.
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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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |