Patent US3322762A successfully refreshed from Google Patents.
US3322762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hexamethylol-melamine and hexakis (methoxy-methyl) melamine
Assignee: PPG Industries Inc
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Filing: 1964-04-08
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Granted: 1967-05-30
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Expires: 1984-04-08
Abstract
No abstract record available.
Inventors
- 👤 Erikson J Alden
- 👤 Alexander N Salem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:45
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/40; C07D251/54; C07D251/70; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/30; C08G12/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
A PROCESS OF METHLOLATING MELAMINE WHICH COMPRISES REACTING MELAMINE WITH FORMALDEHYDE AT A PH OF FROM ABOUT 7 TO ABOUT 9.5 IN A REACTION MIXTURE CONTAINING AT LEAST ABOUT 6.5 MOLES OF FORMALDEHYDE PER MOLE OF MELAMINE AND FROM ABOUT 4 TO ABOUT 12 MOLES OF METHANOL PER MOLE OF MELAMINE.
Claim 2
Dependent Claim
51 words
A PROCESS OF METHLOLATING MELAMINE WHICH COMPRISES REACTING MELAMINE WITH FORMALDEHYDE AT A PH OF FROM ABOUT 7 TO ABOUT 9.5 IN A REACTION MIXTURE CONTAINING AT LEAST ABOUT 6.5 MOLES OF FORMALDEHYDE PER MOLE OF MELAMINE AND FROM ABOUT 4 TO ABOUT 12 MOLES OF METHANOL PER MOLE OF MELAMINE.
Claim 3
Dependent Claim
97 words
A PROCESS OF PRODUCING SUBSTANTIALLY HEXAKIS(METHOXYMETHYL)MELAMINE WHICH COMPRISES REACTING MELAMINE WITH FORMALDEHYDE BY HEATING A REACTION MIXTURE COMPRISING FROM ABOUT 4.5 TO ABOUT 6 MOLES OF METHANOL AND FROM ABOUT 9 TO 11 MOLES OF OFRMALDEHYDE PER MOLE OF MELAMINE AT A PH BETWEEN ABOUT 7 AND ABOUT 9.5 TO FORM A CLEAR SOLUTION, MAINTAINING SAID PH UNTIL A PRECIPITATE IS FORMED, ADDING MORE METHANOL TO PROVIDE AT LEAST ABOUT 20 MOLES OF METHANOL PER MOLE OF MELAMINE, ADJUSTING THE PH TO BETWEEN ABOUT 1 AND ABOUT 3, AND HEATING UNTIL THE REACTION MASS IS ESSENTIALLY CLEAR.
Claim 4
Dependent Claim
97 words
A PROCESS OF PRODUCING SUBSTANTIALLY HEXAKIS(METHOXYMETHYL)MELAMINE WHICH COMPRISES REACTING MELAMINE WITH FORMALDEHYDE BY HEATING A REACTION MIXTURE COMPRISING FROM ABOUT 4.5 TO ABOUT 6 MOLES OF METHANOL AND FROM ABOUT 9 TO 11 MOLES OF OFRMALDEHYDE PER MOLE OF MELAMINE AT A PH BETWEEN ABOUT 7 AND ABOUT 9.5 TO FORM A CLEAR SOLUTION, MAINTAINING SAID PH UNTIL A PRECIPITATE IS FORMED, ADDING MORE METHANOL TO PROVIDE AT LEAST ABOUT 20 MOLES OF METHANOL PER MOLE OF MELAMINE, ADJUSTING THE PH TO BETWEEN ABOUT 1 AND ABOUT 3, AND HEATING UNTIL THE REACTION MASS IS ESSENTIALLY CLEAR.
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |