US2774746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diethylene glycol bis-carbamateformaldehyde condensates
Assignee: Rohm and Haas Co
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Filing: 1954-06-16
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Granted: 1956-12-18
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Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 James P Shelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:22
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06M15/568; C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/20; D06M15/39; D06M15/423; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; Y; Y10; Y10S; Y10S8/00; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A COMPOSITION COMPRISING A WATER-SOLUBLE HIGH MOLECULAR WEIGHT CONDENSATE OF A MIXTURE COMPRISING THE DICARBAMATE OF DIETHYLENE GLYCOL AND FORMALDEHYDE, IN WHICH THE MOLAR RATIO OF FORMALDEHYDE TO THE DICARBAMATE IS FROM 2:1 TO 3.5:1, SAID CONDENSATE HAVING BEEN PREPARED IN AN AQUEOUS MEDIUM AT A PH OF 2.3 TO 3.5 AND AT A TEMPERATURE OF AT LEAST 70*C. AND HAVING A VISCOSITY, AT A CONCENTRATION OF 60% IN WATER AT 25* C., OF 2 TO 25 POISES.
Claim 2
Dependent Claim
78 words
A COMPOSITION COMPRISING A WATER-SOLUBLE HIGH MOLECULAR WEIGHT CONDENSATE OF A MIXTURE COMPRISING THE DICARBAMATE OF DIETHYLENE GLYCOL AND FORMALDEHYDE, IN WHICH THE MOLAR RATIO OF FORMALDEHYDE TO THE DICARBAMATE IS FROM 2:1 TO 3.5:1, SAID CONDENSATE HAVING BEEN PREPARED IN AN AQUEOUS MEDIUM AT A PH OF 2.3 TO 3.5 AND AT A TEMPERATURE OF AT LEAST 70*C. AND HAVING A VISCOSITY, AT A CONCENTRATION OF 60% IN WATER AT 25* C., OF 2 TO 25 POISES.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |