US2689239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing methylol and alkoxymethyl derivatives of polyureidopolyamides and resulting products
Assignee: Rohm and Haas Co
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Filing: 1952-11-28
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Granted: 1954-09-14
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Expires: 1972-11-28
Abstract
No abstract record available.
Inventors
- 👤 Melamed Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:52
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/46; Y; Y10; Y10S; Y10S156/00; Y10S156/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS OF PREPARING METHYLOL DERIVATIVES OF POLYUREIDOPOLYAMIDES WHICH COMPRISES REACTING AN ALKYLENE POLYAMIDE AND EPSILON-CAPROLACTAM TOGETHER AT A TEMPERATURE BETWEEN 150* AND 250* F. IN A RATIO OF ONE MOLE OF SAID POLYAMINE TO ONE TO THREE MOLES OF SAID CAPROLACTAM, WHEREBY A SOLUBLE REACTION PRODUCT IS OBTAINED, COMBINING SAID REACTION PRODUCT WITH UREA AT A TEMPERATURE BETWEEN 110* AND 160* C. UNTIL AT LEAST 70% OF THE THEORETICAL AMMONIA IS EVOLVED, WHEREBY A POLYUREIDOPOLYAMIDE CONDENSATE IS FORMED, AND REACTING SAID CONDENSATE WITH FORMALDEHYDE.
Claim 2
Dependent Claim
85 words
A PROCESS OF PREPARING METHYLOL DERIVATIVES OF POLYUREIDOPOLYAMIDES WHICH COMPRISES REACTING AN ALKYLENE POLYAMIDE AND EPSILON-CAPROLACTAM TOGETHER AT A TEMPERATURE BETWEEN 150* AND 250* F. IN A RATIO OF ONE MOLE OF SAID POLYAMINE TO ONE TO THREE MOLES OF SAID CAPROLACTAM, WHEREBY A SOLUBLE REACTION PRODUCT IS OBTAINED, COMBINING SAID REACTION PRODUCT WITH UREA AT A TEMPERATURE BETWEEN 110* AND 160* C. UNTIL AT LEAST 70% OF THE THEORETICAL AMMONIA IS EVOLVED, WHEREBY A POLYUREIDOPOLYAMIDE CONDENSATE IS FORMED, AND REACTING SAID CONDENSATE WITH FORMALDEHYDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |