Patent US2533166A successfully refreshed from Google Patents.
US2533166A
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Process for polymerizing watersoluble polyacrylamides and poly-alpha-substituted acrylamides
Assignee: GAF Chemicals Corp
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Filing: 1945-10-16
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Granted: 1950-12-05
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Expires: 1965-10-16
Abstract
No abstract record available.
Inventors
- 👤 Giffin D Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:00
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR PREPARING WATER-SOLUBLE GELATIN-COMPATIBLE POLYMERS HAVING A GOLD NUMBER OF LESS THAN 10**-3, WHICH CONSISTS IN CATALYTICALLY POLYMERIZING, AT A TEMPERATURE NOT SUBSTANTIALLY EXCEEDING 40*C., AN AMIDE OF THE CLASS CONSISTING OF THE AMIDES OF ACRYLIC, A-ALKYL-, A-ARYL-, A-ARALKYL-, AND A-HALO-SUBSTITUTED ACRYLIC ACIDS, AND THE N-MONOMETHYL AND N-MONO(B-ETHANOL) DERIVATIVES OF SAID AMIDES, IN THE LIQUID PHASE WHILE DISSOLVED IN A SOLVENT OF THE CLASS CONSISTING OF ALCOHOLS OF 1 TO 3 CARBON ATOMS, DIOXANE, DIMETHYL-FORMAMIDE AND CHLOROFORM; AND RECOVERING THE POLYMER FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
87 words
A PROCESS FOR PREPARING WATER-SOLUBLE GELATIN-COMPATIBLE POLYMERS HAVING A GOLD NUMBER OF LESS THAN 10**-3, WHICH CONSISTS IN CATALYTICALLY POLYMERIZING, AT A TEMPERATURE NOT SUBSTANTIALLY EXCEEDING 40*C., AN AMIDE OF THE CLASS CONSISTING OF THE AMIDES OF ACRYLIC, A-ALKYL-, A-ARYL-, A-ARALKYL-, AND A-HALO-SUBSTITUTED ACRYLIC ACIDS, AND THE N-MONOMETHYL AND N-MONO(B-ETHANOL) DERIVATIVES OF SAID AMIDES, IN THE LIQUID PHASE WHILE DISSOLVED IN A SOLVENT OF THE CLASS CONSISTING OF ALCOHOLS OF 1 TO 3 CARBON ATOMS, DIOXANE, DIMETHYL-FORMAMIDE AND CHLOROFORM; AND RECOVERING THE POLYMER FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2090596A
Cited
US2006002A
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US2171765A
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FR815908A
Cited
GB467402A
Cited
US2289540A
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US2311548A
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CH229430A
Cited
US2409126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |