Patent US3882169A successfully refreshed from Google Patents.
US3882169A
Expired / Lapsed
US
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1,2,2,2,-Tetrachlorethyl acrylate and methacrylate
Assignee: Czech Academy of Sciences
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Filing: 1972-10-27
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Granted: 1975-05-06
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Expires: 1992-10-27
Abstract
Abstract A compound having the formula WHEREIN X is hydrogen, chlorine or a methyl group; homo and copolymers thereof and flame resistant articles made from such polymers.
Inventors
- 👤 Frantisek Hrabak
- 👤 Milos Vacek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:49
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/22; C08L; C08L33/00; C08L33/04; C08L33/14; C08L33/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
7 words
A 1,2,2,2-TETRACHLOROETHYL ESTER COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
7 words
A 1,2,2,2-TETRACHLOROETHYL ESTER COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
16 words
A compound according to claim 1 wherein X is hydrogen and said compound is 1,2,2,2-tetrachloroethyl acrylate.
Claim 4
Dependent Claim
16 words
A compound according to claim 1 wherein X is methyl and said compound is 1,2,2,2-tetrachloroethyl methacrylate.
Claim 5
Dependent Claim
15 words
A compound according to claim 1 wherein X is chlorine and said compound is 1,2,2,2-tetrachloroethyl-2-chloroacrylate.
Claim 6
Independent Claim
23 words
A method of preparing a 1,2,2,2-tetrachloroethyl ester compound comprising reacting in a liquid medium a mixture of chloral and acylchloride of the formula
Claim 7
Independent Claim
23 words
A method of preparing a 1,2,2,2-tetrachloroethyl ester compound comprising reacting in a liquid medium a mixture of chloral and acylchloride of the formula
Claim 8
Dependent Claim
19 words
A method according to claim 5 wherein said reaction is carried out in the presence of an accelerating agent.
Claim 9
Dependent Claim
18 words
A method according to claim 6 wherein said accelerating agent is a mineral acid or a mineral salt.
Claim 10
Dependent Claim
16 words
A method according to claim 5 wherein said liquid medium is a non-solvent for the reactants.
Claim 11
Dependent Claim
22 words
A method according to claim 6 wherein said reaction is carried out in a liquid medium substantially comprised of said accelerating agent.
Claim 12
Dependent Claim
29 words
The method according to claim 5 wherein the reaction is carried out at ambient pressure, and the resultant mixture is fractionated under a partial vacuum to recover the compound.
Claim 13
Dependent Claim
25 words
The method according to claim 6, wherein the accelerating agent is selected from the group consisting of mineral acids, salts and organic or inorganic bases.
Claim 14
Dependent Claim
21 words
The method according to claim 5, wherein said liquid medium is selected from the group consisting of benzene, diethylether or tetrachloromethane.
Claim 15
Dependent Claim
15 words
The method according to claim 5, including the addition of a stabilizer to said mixture.
References Cited (Backward Citations)
US3165502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |