Patent US4618648A successfully refreshed from Google Patents.
US4618648A
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Copolymers of vinyl alcohol and poly(alkyleneoxy)acrylates
Assignee: Celanese International Corp
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Filing: 1985-04-26
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Granted: 1986-10-21
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Expires: 2005-04-26
Abstract
Abstract A vinyl alcohol copolymer comprising the following general structure: <IMAGE> wherein R is hydrogen or methyl; R1 is hydrogen or methyl; R2 is hydrogen, C1-C20 alkyl, C6-C20 aryl or C7-C30 alkylaryl; n is a number from 1-1,000; x is 50-99.9 mole %; y is 0-50 mole %; and z is 0.001-50 mole %.
Inventors
- 👤 Finn L. Marten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:59
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/12
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
77 words
A substantially homogeneous random vinyl alcohol copolymer comprising the following general structure: ##STR6## wherein R is hydrogen or methyl; R 1 is hydrogen or methyl; R 2 is hydrogen, C 1 -C 20 alkyl, C 6 -C 20 aryl or C 7 -C 30 alkylaryl; n is a number from 1-1,000; provided n is not 1 when R 2 is hydrogen, methyl or ethyl; x is 50-99.9 mole%; y is 0-50 mole%; and z is 0.001-50 mole%.
Claim 2
Dependent Claim
77 words
A substantially homogeneous random vinyl alcohol copolymer comprising the following general structure: ##STR6## wherein R is hydrogen or methyl; R 1 is hydrogen or methyl; R 2 is hydrogen, C 1 -C 20 alkyl, C 6 -C 20 aryl or C 7 -C 30 alkylaryl; n is a number from 1-1,000; provided n is not 1 when R 2 is hydrogen, methyl or ethyl; x is 50-99.9 mole%; y is 0-50 mole%; and z is 0.001-50 mole%.
Claim 3
Dependent Claim
10 words
The copolymer of claim 1 in which R is methyl.
Claim 4
Dependent Claim
10 words
The copolymer of claim 1 in which n is 3-100.
Claim 5
Dependent Claim
10 words
The copolymer of claim 1 in which n is 5-50.
Claim 6
Dependent Claim
20 words
The copolymer of claim 1 in which x is 75-99.5 mole%, y is 0-25 mole% and z is 0.005-25 mole%.
Claim 7
Dependent Claim
20 words
The copolymer of claim 1 in which x is 85-99 mole%, y is 0-15 mole% and z is 0.005-15 mole%.
Claim 8
Dependent Claim
20 words
The copolymer of claim 2 in which x is 75-99.5 mole%, y is 0-25 mole% and z is 0.005-25 mole%.
Claim 9
Dependent Claim
20 words
The copolymer of claim 2 in which x is 85-99 mole%, y is 0-15 mole% and z is 0.005-15 mole%.
Claim 10
Dependent Claim
11 words
The copolymer of claim 1 in which R 2 is hydrogen.
Claim 11
Dependent Claim
52 words
A substantially homogeneous random vinyl alcohol copolymer consisting essentially of the following general formula ##STR7## wherein R 1 is hydrogen or methyl; R 2 is hydrogen or a C 1 -C 20 alkyl; n is a number from 3-100; x is 75-99.5 mole%; y is 0-25 mole%; and z is 0.005-25 mole%.
Claim 12
Dependent Claim
52 words
A substantially homogeneous random vinyl alcohol copolymer consisting essentially of the following general formula ##STR7## wherein R 1 is hydrogen or methyl; R 2 is hydrogen or a C 1 -C 20 alkyl; n is a number from 3-100; x is 75-99.5 mole%; y is 0-25 mole%; and z is 0.005-25 mole%.
Claim 13
Dependent Claim
17 words
The copolymer of claim 10 in which R 2 is a C 4 -C 12 alkyl group.
Claim 14
Dependent Claim
11 words
The copolymer of claim 10 in which R 1 is hydrogen.
Claim 15
Dependent Claim
11 words
The copolymer of claim 10 in which R 2 is hydrogen.
Claim 16
Dependent Claim
14 words
The copolymer of claim 10 in which R 1 and R 2 are hydrogen.
Claim 17
Dependent Claim
20 words
The copolymer of claim 10 in which x is 85-99 mole%, y is 0-15 mole% and z is 0.005-15 mole%.
Claim 18
Dependent Claim
10 words
The copolymer of claim 10 in which n is 5-50.
Claim 19
Dependent Claim
53 words
A substantially homogeneous random vinyl alcohol copolymer consisting essentially of the following general formula ##STR8## wherein R 1 is hydrogen or methyl; R 2 is hydrogen or a C 4 -C 12 alkyl group; n is a number from 5-50; x is 85-99 mole%; y is 0-15 mole%; and z is 0.005-15 mole%.
Claim 20
Dependent Claim
53 words
A substantially homogeneous random vinyl alcohol copolymer consisting essentially of the following general formula ##STR8## wherein R 1 is hydrogen or methyl; R 2 is hydrogen or a C 4 -C 12 alkyl group; n is a number from 5-50; x is 85-99 mole%; y is 0-15 mole%; and z is 0.005-15 mole%.
Claim 21
Dependent Claim
11 words
The copolymer of claim 17 in which R 1 is hydrogen.
Claim 22
Dependent Claim
11 words
The copolymer of claim 17 in which R 2 is hydrogen.
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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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |