US2773794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melamine condensation products
Assignee: Monsanto Chemicals Ltd
•
Filing: 1953-03-19
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Granted: 1956-12-11
•
Expires: 1973-03-19
Abstract
No abstract record available.
Inventors
- 👤 George L Fraser
- 👤 Elmer Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:25
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/30; C08G12/32; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31627
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN THE METHOD FOR PREPARING A LAMINATE IN WHICH A PLURALITY OF RESIN-IMPREGNATED LAYERS OF FIBROUS MATERIAL ARE ASSEMBLED IN SUPERIMPOSED RELATIONSHIP, PLACED UNDER PRESSURE AND HEATED UNTIL THE RESIN HAS CURED, THE IMPROVEMENT WHICH COMPRISES IMPREGNATING SAID FIBROUS MATERIAL WITH A CO-CONDENSATION PRODUCT OF MELAMINE, A PHENYL MELAMINE, AND FORMALDEHYDE, THE MOLAR RATIO OF MELAMINE OF PHENYL MELAMINE VARYING BETWEEN 1:0.11:0.3 AND THE MOLAR RATIO OF COMBINED MELAMINE AND PHENYL MELAMINE TO FORMALDEHYDE VARYING BETWEEN 1:2 AND 1:3, AND CO-CONDENSATION PRODUCT HAVING BEEN PREPARED AT A PH OF 8-12, SAID PHENYL MELAMINE BEING A MEMBER OF THE GROUP CONSISTING OF PHENYL MELAMINE, MONOCHLOROPHENYL MELAMINES, DICHLOROPHENYL MELAMINES, NITROPHENYL MELAMINES, AND ALKYLPHENYL MELAMINES IN WHICH THE ALKYL GROUP IS SATURATED AND CONTAINS UP TO 9 CARBON ATOMS.
Claim 2
Dependent Claim
126 words
IN THE METHOD FOR PREPARING A LAMINATE IN WHICH A PLURALITY OF RESIN-IMPREGNATED LAYERS OF FIBROUS MATERIAL ARE ASSEMBLED IN SUPERIMPOSED RELATIONSHIP, PLACED UNDER PRESSURE AND HEATED UNTIL THE RESIN HAS CURED, THE IMPROVEMENT WHICH COMPRISES IMPREGNATING SAID FIBROUS MATERIAL WITH A CO-CONDENSATION PRODUCT OF MELAMINE, A PHENYL MELAMINE, AND FORMALDEHYDE, THE MOLAR RATIO OF MELAMINE OF PHENYL MELAMINE VARYING BETWEEN 1:0.11:0.3 AND THE MOLAR RATIO OF COMBINED MELAMINE AND PHENYL MELAMINE TO FORMALDEHYDE VARYING BETWEEN 1:2 AND 1:3, AND CO-CONDENSATION PRODUCT HAVING BEEN PREPARED AT A PH OF 8-12, SAID PHENYL MELAMINE BEING A MEMBER OF THE GROUP CONSISTING OF PHENYL MELAMINE, MONOCHLOROPHENYL MELAMINES, DICHLOROPHENYL MELAMINES, NITROPHENYL MELAMINES, AND ALKYLPHENYL MELAMINES IN WHICH THE ALKYL GROUP IS SATURATED AND CONTAINS UP TO 9 CARBON ATOMS.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |