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Acrylate and methacrylate monoesters of pentaerythritol and pentaerythritol orthoesters and polymers and copolymers derived therefrom
Assignee: Celanese Corp
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Filing: 1981-03-30
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Granted: 1983-09-20
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Expires: 2001-03-30
Abstract
Abstract Acrylate and methacrylate monoesters of pentaerythritol and pentaerythritol orthoesters are provided. These orthoesters are especially useful as monomers for the preparation of polymers and copolymers having a variety of industrial applications.
Inventors
- 👤 Henry K. Hall
- 👤 Donald R. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:52
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/08; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
An alpha, beta-ethylenically unsaturated orthoester of the general formula ##STR26## in which R 1 is hydrogen or a methyl group and R 2 is hydrogen or a lower alkyl group.
Claim 2
Dependent Claim
30 words
An alpha, beta-ethylenically unsaturated orthoester of the general formula ##STR26## in which R 1 is hydrogen or a methyl group and R 2 is hydrogen or a lower alkyl group.
Claim 3
Dependent Claim
18 words
The alpha, beta-ethylenically unsaturated orthoester of claim 1 wherein R 1 is hydrogen and R 2 is hydrogen.
Claim 4
Dependent Claim
20 words
The alpha, beta-ethylenically unsaturated orthoester of claim 1 wherein R 1 is a methyl group and R 2 is hydrogen.
References Cited (Backward Citations)
US3184441A
Cited
US3577438A
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US3686224A
Cited
US4187383A
Cited
JPS56108792A
Cited
JPS56108793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |