Patent US2863842A successfully refreshed from Google Patents.
US2863842A
Expired / Lapsed
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Process for the preparation of sulfite modified melamine-formaldehyde resin and product obtained
Assignee: Monsanto Chemicals Ltd
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Filing: 1956-05-23
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Granted: 1958-12-09
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Expires: 1976-05-23
Abstract
No abstract record available.
Inventors
- 👤 Francis A Bonzagni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:49
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
AN AQUEOUS SOLUTION OF A THERMOSETTING COLLOIDAL, WATER-DISPERSED, ACID-AGED, CATIONIC, SULFITE-MODIFIED, MELAMINE-FORMALDEHYDE RESIN HAVING A PH OF 0.5-3.5, SAID RESIN, BEFORE SAID AGING, CONTAINING 2.5-4.5 MOLS OF FORMALDEHYDE AND UP TO 0.2 MOL OF SULFONATE GROUPS PER MOL OF MELAMINE AND HAVING A VISCOSITY OF AT LEAST ABOUT 300 CENTIPOISES WHEN MEASURED IN A 55% AQUEOUS SOLUTION AT 25*C.
Claim 2
Dependent Claim
59 words
AN AQUEOUS SOLUTION OF A THERMOSETTING COLLOIDAL, WATER-DISPERSED, ACID-AGED, CATIONIC, SULFITE-MODIFIED, MELAMINE-FORMALDEHYDE RESIN HAVING A PH OF 0.5-3.5, SAID RESIN, BEFORE SAID AGING, CONTAINING 2.5-4.5 MOLS OF FORMALDEHYDE AND UP TO 0.2 MOL OF SULFONATE GROUPS PER MOL OF MELAMINE AND HAVING A VISCOSITY OF AT LEAST ABOUT 300 CENTIPOISES WHEN MEASURED IN A 55% AQUEOUS SOLUTION AT 25*C.
References Cited (Backward Citations)
US2407599A
Cited
US2730516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |