US2840264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide resin composition and method of preparing same
Assignee: Primerica Inc
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Filing: 1957-10-08
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Granted: 1958-06-24
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Expires: 1977-10-08
Abstract
No abstract record available.
Inventors
- 👤 James H Groves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A RESIN COMPOSITION COMPRISING THE REACTION PRODUCT OF ABOUT 50% TO 75% OF A POLYAMIDE RESIN A CONSISTING ESSENTIALLY OF THE POLYACYL GROUPS OF A POLYMERIC FAT ACID AND THE POLYAMINO GROUPS OF A POLYALKYLENE POLYAMINE HAVING TERMINAL PRIMARY AMINO GROUPS, AND ABOUT 25% TO 50% BY WEIGHT OF A POLYAMIDE RESIN B CONSISTING ESSENTIALLY OF THE MIXED POLYACYL GROUPS OF A POLYMERIC FAT ACID AND A 3 TO 8 CARBON ATOM DICARBOXYLIC ACID FREE FROM ETHYLENIC UNSATURATION AND THE DIAMINO GROUPS OF AN ALKYLENE DIPRIMARY DIAMINE, SAID MIXED POLYACYL GROUPS RESULTING FROM A RATIO OF 85% TO 98% BY WEIGHT OF SAID POLYMERIC FAT ACID TO 2% TO 15% BY WEIGHT OF SAID DICARBOXYLIC ACID, SAID REACTION PRODUCT BEING FORMED BY MIXING AND MAINTAINING SAID POLYAMIDE RESINS A AND B AT A TEMPERATURE OF ABOUT 392*F. TO 450*F. FOR A TIME OF ABOUT 1 TO 16 HOURS, THE LONGER TIME BEING USED WITH THE LOWER TEMPERATURE.
Claim 2
Dependent Claim
157 words
A RESIN COMPOSITION COMPRISING THE REACTION PRODUCT OF ABOUT 50% TO 75% OF A POLYAMIDE RESIN A CONSISTING ESSENTIALLY OF THE POLYACYL GROUPS OF A POLYMERIC FAT ACID AND THE POLYAMINO GROUPS OF A POLYALKYLENE POLYAMINE HAVING TERMINAL PRIMARY AMINO GROUPS, AND ABOUT 25% TO 50% BY WEIGHT OF A POLYAMIDE RESIN B CONSISTING ESSENTIALLY OF THE MIXED POLYACYL GROUPS OF A POLYMERIC FAT ACID AND A 3 TO 8 CARBON ATOM DICARBOXYLIC ACID FREE FROM ETHYLENIC UNSATURATION AND THE DIAMINO GROUPS OF AN ALKYLENE DIPRIMARY DIAMINE, SAID MIXED POLYACYL GROUPS RESULTING FROM A RATIO OF 85% TO 98% BY WEIGHT OF SAID POLYMERIC FAT ACID TO 2% TO 15% BY WEIGHT OF SAID DICARBOXYLIC ACID, SAID REACTION PRODUCT BEING FORMED BY MIXING AND MAINTAINING SAID POLYAMIDE RESINS A AND B AT A TEMPERATURE OF ABOUT 392*F. TO 450*F. FOR A TIME OF ABOUT 1 TO 16 HOURS, THE LONGER TIME BEING USED WITH THE LOWER TEMPERATURE.
References Cited (Backward Citations)
US2450940A
Cited
US2728737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |