US2689844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylol derivatives of polymers of ureidoalkyl vinyl ethers
Assignee: Rohm and Haas Co
•
Filing: 1952-04-16
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Granted: 1954-09-21
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Expires: 1972-04-16
Abstract
No abstract record available.
Inventors
- 👤 Melamed Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:15
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/28; C08J; C08J5/00; C08J5/18; Y; Y10; Y10S; Y10S156/00; Y10S156/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR PREPARING METHYLOL DERIVATIVES OF POLYMERS OF UREIDOALKYL VINYL ETHERS WHICH COMPRISES REACTING FORMALDEHYDE AND A POLYMER OF UREIDOALKYL VINYL ETHER IN WHICH THE ALKYL GROUP HAS TWO TO EIGHTEEN CARBON ATOMS AT A PH BETWEEN 7 AND 10 AND AT A TEMPERATURE BETWEEN 20* AND 90* C.
Claim 2
Dependent Claim
50 words
A PROCESS FOR PREPARING METHYLOL DERIVATIVES OF POLYMERS OF UREIDOALKYL VINYL ETHERS WHICH COMPRISES REACTING FORMALDEHYDE AND A POLYMER OF UREIDOALKYL VINYL ETHER IN WHICH THE ALKYL GROUP HAS TWO TO EIGHTEEN CARBON ATOMS AT A PH BETWEEN 7 AND 10 AND AT A TEMPERATURE BETWEEN 20* AND 90* C.
References Cited (Backward Citations)
US2173005A
Cited
US2412993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |