Patent US1525360A successfully refreshed from Google Patents.
US3149148A
Expired / Lapsed
US
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Process for condensation reactions
Assignee: GAF Chemicals Corp
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Filing: 1962-01-02
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Granted: 1964-09-15
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Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Kladko Martin
- 👤 Mark M Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:59
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/20; C07; C07C; C07C255/00; C07C255/01; C07C255/32; C07C255/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR PRODUCING AN A-CYANOACRYLIC COMPOUND WHICH COMPRISES REFLUXING IN A REACTION ZONE (1) A PHENONE WITH (2) A CYANOMETHYLENE COMPOUND IN THE PRESENCE OF (A) AN INERT ORGANIC ACID HAVING A BOILING POINT BELOW ABOUT 165*C., (B) AMMONIUM IONS, (C) A WATER-IMMISCIBLE, INERT, ORGANIC SOLVENT BOILING BELOW THE ACID, THE PRODUCTION OF SAID A-CYANOACRYLIC COMPOUND BEING CATALYZED BY SAID INERT ORGANBIC ACID AND AMMONIUM IONS, FRACTIONATING THE REFULXING VAPORS TO LESS THAN ABOUT 3% ACID WHILE MAINTAINING A REFLUX RATE OF AT LEAST ABOUT 2.7 GRAMS/MINUTE/GRAM-MOLE OF REACTANTS, CONDENSING THE SAID REFLUXING VAPORS AND RETURNING CONDENSED ORGANIC SOLVENT IN A SUBSTANTIALLY ANHYDROUS CONDITION TO SAID REACTION ZONE.
Claim 2
Dependent Claim
109 words
A PROCESS FOR PRODUCING AN A-CYANOACRYLIC COMPOUND WHICH COMPRISES REFLUXING IN A REACTION ZONE (1) A PHENONE WITH (2) A CYANOMETHYLENE COMPOUND IN THE PRESENCE OF (A) AN INERT ORGANIC ACID HAVING A BOILING POINT BELOW ABOUT 165*C., (B) AMMONIUM IONS, (C) A WATER-IMMISCIBLE, INERT, ORGANIC SOLVENT BOILING BELOW THE ACID, THE PRODUCTION OF SAID A-CYANOACRYLIC COMPOUND BEING CATALYZED BY SAID INERT ORGANBIC ACID AND AMMONIUM IONS, FRACTIONATING THE REFULXING VAPORS TO LESS THAN ABOUT 3% ACID WHILE MAINTAINING A REFLUX RATE OF AT LEAST ABOUT 2.7 GRAMS/MINUTE/GRAM-MOLE OF REACTANTS, CONDENSING THE SAID REFLUXING VAPORS AND RETURNING CONDENSED ORGANIC SOLVENT IN A SUBSTANTIALLY ANHYDROUS CONDITION TO SAID REACTION ZONE.
References Cited (Backward Citations)
US2839402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |