Patent US3033833A successfully refreshed from Google Patents.
US3033833A
Expired / Lapsed
US
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Hydrophilic interpolymers of polymerizable ethylenically unsaturated compounds and sulfo esters of alpha-methylene carboxylic acids
Assignee: Dow Chemical Co
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Filing: 1957-03-25
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Granted: 1962-05-08
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Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Fevre Walter J Le
- 👤 David P Sheetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:44
CPC Classifications
C; C08; C08F; C08F28/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
AN ADDITION INTERPOLYMER OF APPRECIABLE PROPORTIONS OF DIFFERENT KINDS OF ETHYLENICALLY UNSATURATED MONOMERS OF WHICH ONE KIND IS A SULFO ESTER HAVING THE FORMULA
Claim 2
Dependent Claim
24 words
AN ADDITION INTERPOLYMER OF APPRECIABLE PROPORTIONS OF DIFFERENT KINDS OF ETHYLENICALLY UNSATURATED MONOMERS OF WHICH ONE KIND IS A SULFO ESTER HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |