US2548282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerizing acrylonitrile in the presence of alkali metal soap of mahogany acids
Assignee: Monsanto Chemicals Ltd
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Filing: 1949-06-25
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Granted: 1951-04-10
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Expires: 1969-06-25
Abstract
No abstract record available.
Inventors
- 👤 Costas H Basdekis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:51
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF PREPARING A POLYMER OF 92 TO 100 PERCENT BY WEIGHT OF ACRYLONITRILE AND UP TO EIGHT PERCENT OF ANOTHER COPOLYMERIZABLE OLEFINIC MONOMER, WHICH COMPRISES MIXING THE MONOMERS IN THE DESIRED PROPORTIONS AND ADDING THEM GRADUALLY TO WATER AT REFLUX TEMPERATURE IN THE PRESENCE OF FROM 0.05 TO 0.20 PERCENT BY WEIGHT OF ALKALI METAL SOAP OF MAHOGANY ACIDS, AND IN THE PRESENCE OF FROM 0.5 TO 2.0 PERCENT BY WEIGHT OF AN ALKALI METAL PERSULFATE, SAID PERCENTAGES BEING BASED ON THE WEIGHT OF THE TOTAL MONOMERS.
Claim 2
Independent Claim
89 words
A METHOD OF PREPARING A POLYMER OF 92 TO 100 PERCENT BY WEIGHT OF ACRYLONITRILE AND UP TO EIGHT PERCENT OF ANOTHER COPOLYMERIZABLE OLEFINIC MONOMER, WHICH COMPRISES MIXING THE MONOMERS IN THE DESIRED PROPORTIONS AND ADDING THEM GRADUALLY TO WATER AT REFLUX TEMPERATURE IN THE PRESENCE OF FROM 0.05 TO 0.20 PERCENT BY WEIGHT OF ALKALI METAL SOAP OF MAHOGANY ACIDS, AND IN THE PRESENCE OF FROM 0.5 TO 2.0 PERCENT BY WEIGHT OF AN ALKALI METAL PERSULFATE, SAID PERCENTAGES BEING BASED ON THE WEIGHT OF THE TOTAL MONOMERS.
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) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |