US2960486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer composition and method
Assignee: Dow Chemical Co
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Filing: 1957-05-20
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Granted: 1960-11-15
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Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 David J Pye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:45
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/006; C08K; C08K3/00; C08K3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A COMPOSITION WHICH CONSISTS ESSENTIALLY OF AN INTIMATE MIXTURE OF AN ACRYLAMIDE POLYMER CONTAINING RESIDUAL ACRYLAMIDE MONOMER, SAID POLYMER BEING SELECTED FROM HOMOPOLYMERS OF ACRYLAMIDE AND WATER-SOLUBLE COPOLYMERS OF THE GROUP CONSISTING OF COPLOYMERS OF ACRYLAMIDE WITH UP TO ABOUT 50 MOLE PERCENT OF A MEMBER OF THE GROUP CONSISTING OF ACRYLIC ACID, METHACYRLIC ACID, METHACRYLAMIDE, VINYLBENZYL-AMMONUIM COMPOUNDS, VINYLBENZENE SULFONIC ACID AND MALEIC ACID AND COPOLYMERS OF ACRYLAMIDE WITH UP TO 25 MOLE PERCENT OF A MEMALKYL ESTERS OF ACRYLIC ACID, ALKYL ESTERS OF METHACRYLIC ACID, VINYL CHLORIDE AND VINYLIDENE CHLORIDE, WITH A SULFITE SELECTED FROM THE GROUP CONSISTING OF AMMOUNIM, MAGNESIUM AND ALKALI METAL SULFITES AND BISULFITES AND CALCUIM BISULFITES, SAID SULFITE BEING EMPLOYED IN THE AMOUNT OF AT LEAST 1 MOLE OF SULFITE PER MOLE OF RSIDUAL UNREACTED ACRYLAMIDE MONOMER IN SAID POLYMER.
Claim 2
Dependent Claim
135 words
A COMPOSITION WHICH CONSISTS ESSENTIALLY OF AN INTIMATE MIXTURE OF AN ACRYLAMIDE POLYMER CONTAINING RESIDUAL ACRYLAMIDE MONOMER, SAID POLYMER BEING SELECTED FROM HOMOPOLYMERS OF ACRYLAMIDE AND WATER-SOLUBLE COPOLYMERS OF THE GROUP CONSISTING OF COPLOYMERS OF ACRYLAMIDE WITH UP TO ABOUT 50 MOLE PERCENT OF A MEMBER OF THE GROUP CONSISTING OF ACRYLIC ACID, METHACYRLIC ACID, METHACRYLAMIDE, VINYLBENZYL-AMMONUIM COMPOUNDS, VINYLBENZENE SULFONIC ACID AND MALEIC ACID AND COPOLYMERS OF ACRYLAMIDE WITH UP TO 25 MOLE PERCENT OF A MEMALKYL ESTERS OF ACRYLIC ACID, ALKYL ESTERS OF METHACRYLIC ACID, VINYL CHLORIDE AND VINYLIDENE CHLORIDE, WITH A SULFITE SELECTED FROM THE GROUP CONSISTING OF AMMOUNIM, MAGNESIUM AND ALKALI METAL SULFITES AND BISULFITES AND CALCUIM BISULFITES, SAID SULFITE BEING EMPLOYED IN THE AMOUNT OF AT LEAST 1 MOLE OF SULFITE PER MOLE OF RSIDUAL UNREACTED ACRYLAMIDE MONOMER IN SAID POLYMER.
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) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |