US2885438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of polymer-izable acrylamido methylene ureas
Assignee: BASF Schweiz AG
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Filing: 1953-11-05
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Granted: 1959-05-05
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Expires: 1973-11-05
Abstract
No abstract record available.
Inventors
- 👤 Porret Daniel
- 👤 Leumann Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:20
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/04; C07C275/06; C07C275/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR THE MANUFACTURE OF A POLYMERIZABLE AMIDE-LIKE COMPOUND WHICH COMPRISES REACTING IN THE PRESENCE OF CONCENTRATED SULFURIC ACID AS THE REACTION MEDIUM AND IN THE ABSENCE OF A POLYMERIZATION CATALYST ONE MOL OF UREA WITH ONE MOLE OF FORMALDEHYDE AND ONE MOL OF ACRYLONITRILE.
Claim 2
Dependent Claim
46 words
A PROCESS FOR THE MANUFACTURE OF A POLYMERIZABLE AMIDE-LIKE COMPOUND WHICH COMPRISES REACTING IN THE PRESENCE OF CONCENTRATED SULFURIC ACID AS THE REACTION MEDIUM AND IN THE ABSENCE OF A POLYMERIZATION CATALYST ONE MOL OF UREA WITH ONE MOLE OF FORMALDEHYDE AND ONE MOL OF ACRYLONITRILE.
References Cited (Backward Citations)
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US2337547A
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US2340045A
Cited
US2512671A
Cited
US2543094A
Cited
US2476065A
Cited
US2679494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |