Patent US4916208A successfully refreshed from Google Patents.
US4916208A
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Novel polymers
Assignee: Shell USA Inc
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Filing: 1989-03-15
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Granted: 1990-04-10
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Expires: 2009-03-15
Abstract
Abstract Novel, linear alternating polymers of carbon monoxide and at least one ethylenically unsaturated hydrocarbon have a high degree of monomeric unit purity. The polymers, produced with a catalyst composition formed from preformed palladium trifluoroacetate and a bidentate phosphorous ligand, exhibit improved thermal stability and enhanced crystallinity and crystallizability.
Inventors
- 👤 George B. Klingensmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:05
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
24 words
A linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon having a monomeric unit purity of over 99.5% by mol.
Claim 2
Dependent Claim
24 words
A linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon having a monomeric unit purity of over 99.5% by mol.
Claim 3
Dependent Claim
41 words
The polymer of claim 1 represented by the repeating formula ##STR10## wherein B is the moiety of an alpha-olefin of at least 3 carbon atoms polymerized through the ethylenic unsaturation thereof, and the ratio of y:x is no more than 0.5.
Claim 4
Dependent Claim
9 words
The polymer of claim 2 wherein y is 0.
Claim 5
Dependent Claim
16 words
The polymer of claim 3 wherein a portion of the monomeric units contain dimethyl ketal moieties.
Claim 6
Dependent Claim
17 words
The polymer of claim 2 wherein the ratio of y:x is from about 0.01 to about 0.1.
Claim 7
Dependent Claim
12 words
The polymer of claim 5 wherein B is a moiety of propylene.
Claim 8
Dependent Claim
16 words
The polymer of claim 6 wherein a portion of the monomeric units contain dimethyl ketal moieties.
Claim 9
Dependent Claim
15 words
The polymer of claim 2 wherein said alpha-olefin has up to 20 carbon atoms inclusive.
Claim 10
Dependent Claim
26 words
The polymer of claim 1 having a molecular weight of 1,000 to about 200,000 and a melting point of about 175° C. to about 300° C.
Claim 11
Dependent Claim
16 words
The polymer of claim 1 wherein said monomeric unit purity is determined by 13 C-NMR methods.
Claim 12
Dependent Claim
8 words
The polymer of claim 1 having enhanced crystallinity.
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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) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |