US4594448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of vinylcarboxylic acids
Assignee: Roehm GmbH Darmstadt
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Filing: 1985-08-09
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Granted: 1986-06-10
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Expires: 2005-08-09
Abstract
Abstract Esters of vinylcarboxylic acids having the formula (I): ##STR1## wherein R is H, or methyl. The esters of the present invention are useful as monomers which can be used to prepare polymers which are used to prepare dental materials.
Inventors
- 👤 Heinz-Juergen Hohage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:31
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16; C08F20/18; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
Esters of vinylcarboxylic acids having the formula (I): ##STR7## wherein R is H, or methyl.
Claim 2
Dependent Claim
15 words
Esters of vinylcarboxylic acids having the formula (I): ##STR7## wherein R is H, or methyl.
Claim 3
Dependent Claim
27 words
A homopolymer or copolymer comprising as at least one of the repeating monomer units, a monomer of the formula (I): ##STR8## wherein R is H, or methyl.
Claim 4
Dependent Claim
27 words
A homopolymer or copolymer comprising as at least one of the repeating monomer units, a monomer of the formula (I): ##STR8## wherein R is H, or methyl.
Claim 5
Dependent Claim
13 words
The homopolymer or copolymer according to claim 2, produced by free radical polymerization.
Claim 6
Dependent Claim
44 words
The copolymer of claim 2, which further comprises as a repeating monomer unit, a monomer selected from the group consisting of esters and amides of acrylic acid and methacrylic acid, acrylonitrile, methacrylonitrile, styrene and the alkylated derivatives of styrene, vinyl esters and vinyl ethers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |