Patent US2521088A successfully refreshed from Google Patents.
Patent US3816267A successfully refreshed from Google Patents.
US3816267A
Expired / Lapsed
US
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Inhibition of acrylate polymerization
Assignee: Union Carbide Corp
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Filing: 1971-08-20
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Granted: 1974-06-11
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Expires: 1991-08-20
Abstract
Abstract This invention is concerned with inhibiting acrylates or methacrylates against polymerization during their distillation by providing predetermined and controlled quantities of a mixture of a quinone and an enol derivative of a quinone in the acrylates or methacrylates while they are undergoing distillation.
Inventors
- 👤 V Chuang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:21
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/20; C07C; C07C67/00; C07C67/48; C07C67/52; C07C67/54; C07C67/62; C08; C08F; C08F2/00; C08F2/002; C08F2/007; Y; Y10; Y10S; Y10S203/00; Y10S203/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
The process of claim 1 wherein the distilled acrylate or methacrylate is recovered and contains such predetermined amount of said combination.
Claim 2
Dependent Claim
12 words
The process of claim 1 wherein said combination is hydroquinone and benzoquinone.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the distilled product is gamma-methacryloxypropyltrimethoxy-silane.
Claim 4
Dependent Claim
12 words
The process of claim 4 wherein said combination is hydroquinone and benzoquinone.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |