US2864779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing urea-formaldehyde molding powders
Assignee: Societe Belge de lAzote et des Produits Chimiques du Marly SA
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Filing: 1956-07-25
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Granted: 1958-12-16
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Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Bihan Henri Le
- 👤 Godart Jean Andre Robert
- 👤 Burton Raymond Alphonse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:40
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/20; C08L61/22; C08L61/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR THE PREPARATION OF UREA-FORMALDEHYDE MOLDING POWDERS IN THE FORM OF GRANULES, COMPRISING THE INCORPORATION OF 25 PARTS BY WEIGHT OF FINELY PULVERIZED PAPER AND 10 TO 15 PARTS OF A SETTING CATALYST COMPOSED OT 30 TO 35% MELAMINE, 30 TO 35% SULFATE OF MELAMINE AND 30 TO 40% HEXAMETHYLENE TETRAMINE AT A TEMPERATURE NOT EXCEEDING 40*C. INTO 100 PARTS OF A UREA-FORMALDEHYDE CONDENSATION PRODUCT CONSISTING OF A MIXTURE OF MONO- AND DIMETHY,LOLUREAS, AND THE SUBSEQUENT DRYING OF THE PRODUCT THUS OBTAINED WITH THE CATALYST THEREIN.
Claim 2
Dependent Claim
88 words
A PROCESS FOR THE PREPARATION OF UREA-FORMALDEHYDE MOLDING POWDERS IN THE FORM OF GRANULES, COMPRISING THE INCORPORATION OF 25 PARTS BY WEIGHT OF FINELY PULVERIZED PAPER AND 10 TO 15 PARTS OF A SETTING CATALYST COMPOSED OT 30 TO 35% MELAMINE, 30 TO 35% SULFATE OF MELAMINE AND 30 TO 40% HEXAMETHYLENE TETRAMINE AT A TEMPERATURE NOT EXCEEDING 40*C. INTO 100 PARTS OF A UREA-FORMALDEHYDE CONDENSATION PRODUCT CONSISTING OF A MIXTURE OF MONO- AND DIMETHY,LOLUREAS, AND THE SUBSEQUENT DRYING OF THE PRODUCT THUS OBTAINED WITH THE CATALYST THEREIN.
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) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |