Patent US2697086A successfully refreshed from Google Patents.
US2697086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified melamine-formaldehyde resin and process of preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1952-03-18
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Granted: 1954-12-14
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Expires: 1972-03-18
Abstract
No abstract record available.
Inventors
- 👤 Lindenfelser Richard
- 👤 Martha K Kilthau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:46
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A PROCESS FOR PRODUCING A RESINOUS COMPOSITION, SUITABLE FOR USE IN PREPARING LAMINATE SURFACES, COMPRISING HEATING MELAMINE, FORMALDEHYDE AND A POLYVINYL BUTYRAL AT A PH BETWEEN ABOUT 7-10.5 AND AT A TEMPERATURE BETWEEN ABOUT 75* C. AND REFLUX IN AN ALCOHOL AQUEOUS MEDIUM UNTIL THE REACTION SOLUTION NO LONGER CRYSTALLIZES UPON COOLING TO 0* C., WHEREIN THE MOL RATIO OF THE MELAMINE TO FORMALDEHYDE IS BETWEEN 1:15 AND 1:4.5, RESPECTIVELY, WHEREIN SAID POLYVINYL BUTYRAL HAS A HYDROXYL NUMBER BETWEEN ABOUT 400 AND 800 AND SAID POLYVINYL BUTYRAL IS PRESENT IN THE COMPOSITION IN AN AMOUNT VARYING BETWEEN ABOUT 20%-40% BY WEIGHT BASED ON THE TOTAL WEIGHT OF RESIN SOLIDS WHEREIN SAID ALCOHOL IS A LOWER SATURATED MONOHYDRIC ALIPHATIC ALCOHOL HAVING 1-4 CARBON ATOMS AND SAID AQUEOUS ALCOHOL SOLUTION HAS A CONCENTRATION OF ALCOHOL BETWEEN ABOUT 4080% BY WEIGHT BASED ON THE TOTAL WEIGHT OF ALCOHOL AQUEOUS SOLUTION.
Claim 2
Dependent Claim
147 words
A PROCESS FOR PRODUCING A RESINOUS COMPOSITION, SUITABLE FOR USE IN PREPARING LAMINATE SURFACES, COMPRISING HEATING MELAMINE, FORMALDEHYDE AND A POLYVINYL BUTYRAL AT A PH BETWEEN ABOUT 7-10.5 AND AT A TEMPERATURE BETWEEN ABOUT 75* C. AND REFLUX IN AN ALCOHOL AQUEOUS MEDIUM UNTIL THE REACTION SOLUTION NO LONGER CRYSTALLIZES UPON COOLING TO 0* C., WHEREIN THE MOL RATIO OF THE MELAMINE TO FORMALDEHYDE IS BETWEEN 1:15 AND 1:4.5, RESPECTIVELY, WHEREIN SAID POLYVINYL BUTYRAL HAS A HYDROXYL NUMBER BETWEEN ABOUT 400 AND 800 AND SAID POLYVINYL BUTYRAL IS PRESENT IN THE COMPOSITION IN AN AMOUNT VARYING BETWEEN ABOUT 20%-40% BY WEIGHT BASED ON THE TOTAL WEIGHT OF RESIN SOLIDS WHEREIN SAID ALCOHOL IS A LOWER SATURATED MONOHYDRIC ALIPHATIC ALCOHOL HAVING 1-4 CARBON ATOMS AND SAID AQUEOUS ALCOHOL SOLUTION HAS A CONCENTRATION OF ALCOHOL BETWEEN ABOUT 4080% BY WEIGHT BASED ON THE TOTAL WEIGHT OF ALCOHOL AQUEOUS SOLUTION.
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) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |