US2683134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ethylenepolyaminemodified urea-formaldehyde resins
Assignee: Honeywell International Inc
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Filing: 1951-12-17
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Granted: 1954-07-06
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Expires: 1971-12-17
Abstract
No abstract record available.
Inventors
- 👤 John B Davidson
- 👤 Edward J Romatowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:38
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; D21H17/50; C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/043; C08G12/046; Y; Y10; Y10S; Y10S116/00; Y10S116/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF PRODUCING A THERMOSETTING RESIN CAPABLE OF IMPARTING SUPERIOR WET STRENGTH TO PAPER THAT COMPRISES BRINGING TOGETHER A UREAFORMALDEHYDE REACTION PRODUCT OF LESS THAN THE DESIRED VISCOSITY, WHEREIN THE MOLAR RATIO OF UREA TO FORMALDEHYDE IS FROM 1:1.9 TO 1:3.0, AND FROM 0.01 TO 0.2 MOL PER MOL OF UREA OF A WATER-SOLUBLE SALT OF AN ETHYLENEPOLYAMINE HAVING NOT MORE THAN FOUR ETHYLENE GROUPS IN AQUEOUS SOLUTION AT A PH ABOVE 4, AND THEN CARRYING OUT CONDENSATION BY MAINTAINING THE SOLUTION AT A PH ABOVE 4 AND BELOW 6 AND HEATING AT A TEMPERATURE FROM 70 DEGREES C. TO THE BOILING POINT TO EFFECT VISCOSITY INCREASE.
Claim 2
Independent Claim
108 words
A METHOD OF PRODUCING A THERMOSETTING RESIN CAPABLE OF IMPARTING SUPERIOR WET STRENGTH TO PAPER THAT COMPRISES BRINGING TOGETHER A UREAFORMALDEHYDE REACTION PRODUCT OF LESS THAN THE DESIRED VISCOSITY, WHEREIN THE MOLAR RATIO OF UREA TO FORMALDEHYDE IS FROM 1:1.9 TO 1:3.0, AND FROM 0.01 TO 0.2 MOL PER MOL OF UREA OF A WATER-SOLUBLE SALT OF AN ETHYLENEPOLYAMINE HAVING NOT MORE THAN FOUR ETHYLENE GROUPS IN AQUEOUS SOLUTION AT A PH ABOVE 4, AND THEN CARRYING OUT CONDENSATION BY MAINTAINING THE SOLUTION AT A PH ABOVE 4 AND BELOW 6 AND HEATING AT A TEMPERATURE FROM 70 DEGREES C. TO THE BOILING POINT TO EFFECT VISCOSITY INCREASE.
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) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |