US3342893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylated condensate of formaldehyde and a diamide of an m-phenylene dicarboxylic acid
Assignee: Rohm and Haas Co
•
Filing: 1963-11-29
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Granted: 1967-09-19
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 William D Emmons
- 👤 Mercurio Andrew
- 👤 Francis H Mcgrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:28
CPC Classifications
C; C09; C09D; C09D135/00; C08; C08L; C08L61/00; C08L61/20; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/066; C09D133/24; C09D133/26; C09D167/00; C09D167/08; C08L61/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A CONDENSATION PRODUCT OF THE FORMULA
Claim 2
Dependent Claim
6 words
A CONDENSATION PRODUCT OF THE FORMULA
Claim 3
Independent Claim
159 words
A METHOD OF PRODUCING A THERMOSETTABLE CONDENSATION PRODUCT WHICH COMPRISES HEATING, AT A PH OF 2 TO 6 AND AT A TEMPERATURE OF ABOUT 80* TO 120*C., A MIXTURE OF ISOPHTHALAMIDE, FORMALDEHYDE, WATER, AND ACID IN WHICH THE PROPORTION OF FORMALDEHYDE IS FROM ABOUT 1.8 TO ABOUT 3.2 MOLES PER MOLE OF ISOPHTHALAMIDE AND THE WATER IS PRESENT IN AN AMOUNT OF ABOUT 25% TO 50% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MIXTURE, THE HEATING BEING CONTINUED UNTIL THE REACTION MIXTURE CLEARS AND THE WATER CONTENT OF THE MIXTURE BEING MAINTAINED AT A CONCENTRATION OF AT LEAST 25% THROUGHOUT THE HEATING, AND THEN ADDING AT LEAST ONE ALCOHOL HAVING FROM 1 TO 8 CARBON ATOMS, WHILE MAINTAINING THE TEMPERATURE IN THE RANGE OF 75*C. TO 150*C., THE AMOUNT OF ALCOHOL ADDED BEING AT LEAST 1.5 TO 5 MOLES PER MOLE OF ISOPHTHALAMIDE, WHEREBY AN ALCOHOLIC SOLUTION OF AN ALKYLATION PRODUCT OF AN ISOPHTHALAMIDE/FORMALDEHYDE CONDENSATE IS FORMED.
Claim 4
Independent Claim
159 words
A METHOD OF PRODUCING A THERMOSETTABLE CONDENSATION PRODUCT WHICH COMPRISES HEATING, AT A PH OF 2 TO 6 AND AT A TEMPERATURE OF ABOUT 80* TO 120*C., A MIXTURE OF ISOPHTHALAMIDE, FORMALDEHYDE, WATER, AND ACID IN WHICH THE PROPORTION OF FORMALDEHYDE IS FROM ABOUT 1.8 TO ABOUT 3.2 MOLES PER MOLE OF ISOPHTHALAMIDE AND THE WATER IS PRESENT IN AN AMOUNT OF ABOUT 25% TO 50% BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MIXTURE, THE HEATING BEING CONTINUED UNTIL THE REACTION MIXTURE CLEARS AND THE WATER CONTENT OF THE MIXTURE BEING MAINTAINED AT A CONCENTRATION OF AT LEAST 25% THROUGHOUT THE HEATING, AND THEN ADDING AT LEAST ONE ALCOHOL HAVING FROM 1 TO 8 CARBON ATOMS, WHILE MAINTAINING THE TEMPERATURE IN THE RANGE OF 75*C. TO 150*C., THE AMOUNT OF ALCOHOL ADDED BEING AT LEAST 1.5 TO 5 MOLES PER MOLE OF ISOPHTHALAMIDE, WHEREBY AN ALCOHOLIC SOLUTION OF AN ALKYLATION PRODUCT OF AN ISOPHTHALAMIDE/FORMALDEHYDE CONDENSATE IS FORMED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |