Patent US3371067A successfully refreshed from Google Patents.
US3371067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melamine-formaldehyde-acrylonitrile condensation product and process of making same
Assignee: Plastics Engineering Co
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Filing: 1964-03-02
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Granted: 1968-02-27
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Ralph S Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:40
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; C08G12/26; C08G12/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE PROCESS OF PREPARING A MELAMINE-FORMALDEHYDE RESIN OF IMPROVED FLOW CHARACTERISTICS COMPRISING THE STEPS OF: (A) REACTING MELAMINE AND FORMALDEHYDE AT A PH OF APPROXIMATELY 8-11 AND AT A TEMPERATURE OF 70-95* C., SAID FORMALDEHYDE BEING USED IN A PROPORTION OF 2-5 MOLES PER MOLE OF MELAMINE, AND (B) REACTING THE RESULTANT MELAMINE-FORMALDEHYDE REACTION PRODUCT WITH ACRYLONITRILE IN A PROPORTION OF 0.5-6 MOLES OF ACRYLONITRILE PER MOLE OF THE MELAMINE USED IN THE PREPARATION OF SAID MELAMINE-FORMALDEHYDE RESIN, SAID ACRYLONITRILE REACTION BEING CONDUCTED AT A PH OF AT LEAST 7.5 AND BY REFLUXING UNTIL A REFLUX TEMPERATURE OF AT LEAST 85*C. IS REACHED.
Claim 2
Dependent Claim
103 words
THE PROCESS OF PREPARING A MELAMINE-FORMALDEHYDE RESIN OF IMPROVED FLOW CHARACTERISTICS COMPRISING THE STEPS OF: (A) REACTING MELAMINE AND FORMALDEHYDE AT A PH OF APPROXIMATELY 8-11 AND AT A TEMPERATURE OF 70-95* C., SAID FORMALDEHYDE BEING USED IN A PROPORTION OF 2-5 MOLES PER MOLE OF MELAMINE, AND (B) REACTING THE RESULTANT MELAMINE-FORMALDEHYDE REACTION PRODUCT WITH ACRYLONITRILE IN A PROPORTION OF 0.5-6 MOLES OF ACRYLONITRILE PER MOLE OF THE MELAMINE USED IN THE PREPARATION OF SAID MELAMINE-FORMALDEHYDE RESIN, SAID ACRYLONITRILE REACTION BEING CONDUCTED AT A PH OF AT LEAST 7.5 AND BY REFLUXING UNTIL A REFLUX TEMPERATURE OF AT LEAST 85*C. IS REACHED.
References Cited (Backward Citations)
US2476065A
Cited
GB779232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |