US3277173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing aromatic polyamines
Assignee: Bayer Corp
•
Filing: 1963-06-13
•
Granted: 1966-10-04
•
Expires: 1983-06-13
Abstract
No abstract record available.
Inventors
- 👤 Eugene L Powers
- 👤 Irvin B Van Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:07
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C07; C07C; C07C209/00; C07C209/68; C07C209/78; C07C211/00; C07C211/43; C07C211/44; C07C211/49; C07C263/00; C07C263/10; C08G12/00; C08G12/02; C08G12/04; C08G12/06; C08G12/08; C08G18/77; C08G18/773; C08G73/00; C08G73/02; C08G73/026; C08G73/0266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF PREPARING A MIXTURE OF POLYAMINES WHICH COMPRISES REACTING ANILINE WITH FORMALDEHYDE IN THE MOLAR RATIO OF AT LEAST ABOUT ONE MOL OF ANILINE PER MOL OF FORMALDEHYDE IN THE PRESENCE OF WATER OF CONDENSATION OF ANILINE TO WATER INCLUDING THE WATER OF CONDENSATION BEING WITHIN THE RANGE OF FROM ABOUT 1:1 TO ABOUT 4:1, SAID PRPCESS BEING CARRIED OUT BY CONTINOUSLY INTRODUCING ANILINE AND FORMALDEHYDE INTO A REACTION ZONE UNDER CONDITIONS WHICH CAUSE TURBULENT FLOW AT A REYNOLDS NUMBER OF FROM ABOUT 4500 TO ABOUT 100,000, THE RESULTING MIXTURE OF POLYAMINES HAVING A DIAMINE CONTENT WHICH IS MADE UP OF ABOUT 10% TO ABOUT 35% 2,4''-ISOMER.
Claim 2
Independent Claim
109 words
A METHOD OF PREPARING A MIXTURE OF POLYAMINES WHICH COMPRISES REACTING ANILINE WITH FORMALDEHYDE IN THE MOLAR RATIO OF AT LEAST ABOUT ONE MOL OF ANILINE PER MOL OF FORMALDEHYDE IN THE PRESENCE OF WATER OF CONDENSATION OF ANILINE TO WATER INCLUDING THE WATER OF CONDENSATION BEING WITHIN THE RANGE OF FROM ABOUT 1:1 TO ABOUT 4:1, SAID PRPCESS BEING CARRIED OUT BY CONTINOUSLY INTRODUCING ANILINE AND FORMALDEHYDE INTO A REACTION ZONE UNDER CONDITIONS WHICH CAUSE TURBULENT FLOW AT A REYNOLDS NUMBER OF FROM ABOUT 4500 TO ABOUT 100,000, THE RESULTING MIXTURE OF POLYAMINES HAVING A DIAMINE CONTENT WHICH IS MADE UP OF ABOUT 10% TO ABOUT 35% 2,4''-ISOMER.
References Cited (Backward Citations)
US2822373A
Cited
US3163666A
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US2732392A
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US2733254A
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US1803331A
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US1954484A
Cited
US2261002A
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US2683730A
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US2837530A
Cited
US2818433A
Cited
US2974168A
Cited
US2828341A
Cited
US3097191A
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US2938054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |