Patent US2562853A successfully refreshed from Google Patents.
US2562853A
Expired / Lapsed
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Insolubilization of water-soluble copolymers
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-08-14
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Granted: 1951-07-31
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Expires: 1968-08-14
Abstract
No abstract record available.
Inventors
- 👤 Baer Massimo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:39
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS WHICH CONSITS IN TREATING WITH WATER AT TEMPERATURE UP TO 200* C., A WATERSOLUBLE COPOLYMER OF ONE MOL OF AN ACIDIC COMPOUND FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE, ACRYLIC ACID, METHACRYLIC ACID AND CRONTONIC ACID, WITH FROM ONE TO TWO MOLS OF A COPOLYMERIZABLE MATERIAL CONTAINING A CH2=C< GROUP, AT LEAST 25 MOLS PERCENT OF SAID COPOLYMERIZABLE MATERIAL BEING VINYL FORMATE, UNTIL THE COPOLYMER BECOMES INSOLUBLE IN WATER, SAID COPOLYMER, PRIOR TO TREATMENT WITH WATER, BEING SOLUBLE IN WATER AT LEAST TO THE EXTENT OF FORMING 10% SOLUTIONS THEREIN.
Claim 2
Dependent Claim
94 words
A PROCESS WHICH CONSITS IN TREATING WITH WATER AT TEMPERATURE UP TO 200* C., A WATERSOLUBLE COPOLYMER OF ONE MOL OF AN ACIDIC COMPOUND FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE, ACRYLIC ACID, METHACRYLIC ACID AND CRONTONIC ACID, WITH FROM ONE TO TWO MOLS OF A COPOLYMERIZABLE MATERIAL CONTAINING A CH2=C< GROUP, AT LEAST 25 MOLS PERCENT OF SAID COPOLYMERIZABLE MATERIAL BEING VINYL FORMATE, UNTIL THE COPOLYMER BECOMES INSOLUBLE IN WATER, SAID COPOLYMER, PRIOR TO TREATMENT WITH WATER, BEING SOLUBLE IN WATER AT LEAST TO THE EXTENT OF FORMING 10% SOLUTIONS THEREIN.
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) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |