Patent US2883369A successfully refreshed from Google Patents.
US2883369A
Expired / Lapsed
US
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Surface-active agents derived from acrylates and methacrylates
Assignee: Shawinigan Chemicals Ltd
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Filing: 1956-04-19
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Granted: 1959-04-21
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Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Richard W Rees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:59
CPC Classifications
C; C09; C09K; C09K23/00; C09K23/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR PREPARING A SURFACE-ACTIVE MATERIAL WHICH COMPRISES REACTING A MIXTURE CONSISTING OF (A) SULPHUR DIOXIDE, (B) A MEMBER OF THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, ACRYLONITRILE, METHACRYLONITRILE, AND LOWER ALKYL ESTERS OF THE SAID ACIDS HAVING UP TO TEN CARBON ATOMS IN THE ALKYL GROUP, SAID SULPHUR DIOXIDE BEING PRESENT IN THE AMOUNT OF AT LEAST 5% BASED ON THE WEIGHT OF THE TOTAL MIXTURE, AND (C) FROM 2.3 TO 11%, BY WEIGHT OF THE TOTAL MIXTURE, OF AN ORGANIC PEROXY COMPOUND OF THE GROUP CONSISTING OF ORGANIC HYDROPEROXIDES AND METHYL ETHYL KETONE PEROXIDE.
Claim 2
Dependent Claim
98 words
A PROCESS FOR PREPARING A SURFACE-ACTIVE MATERIAL WHICH COMPRISES REACTING A MIXTURE CONSISTING OF (A) SULPHUR DIOXIDE, (B) A MEMBER OF THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID, ACRYLONITRILE, METHACRYLONITRILE, AND LOWER ALKYL ESTERS OF THE SAID ACIDS HAVING UP TO TEN CARBON ATOMS IN THE ALKYL GROUP, SAID SULPHUR DIOXIDE BEING PRESENT IN THE AMOUNT OF AT LEAST 5% BASED ON THE WEIGHT OF THE TOTAL MIXTURE, AND (C) FROM 2.3 TO 11%, BY WEIGHT OF THE TOTAL MIXTURE, OF AN ORGANIC PEROXY COMPOUND OF THE GROUP CONSISTING OF ORGANIC HYDROPEROXIDES AND METHYL ETHYL KETONE PEROXIDE.
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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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |