US2636873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of polyamides and polymeric polyamines
Assignee: EIDP Inc
•
Filing: 1949-08-13
•
Granted: 1953-04-28
•
Expires: 1969-08-13
Abstract
No abstract record available.
Inventors
- 👤 Graham Boynton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:41
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/04; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A COMPOSITION CONSISTING ESSENTIALLY OF A BLENDED MIXTURE OF A HYDROPHOBIC ALPHA-PRIMARY MONOAMINOMONOMCARBOXYLIC ACID POLYAMIDE COMPOSED OF MONOAMINOMONOCARBOXYLIC ACID UNITS CONTAINING ONLY CARBON, HYDROGEN, THE ONE AMIDO NITROGEN, AND THE ONE CARBONYL OXYGEN, OF INTRINSIC VISCOSITY, IN POLAR SOLVENTS, OF AT LEAST 0.4, AND HAVING A WATER ABSORPTION OF 100% RELATIVE HUMIDITY AT 25* C. OF LESS THAN 5% WITH FROM 1 TO 25%, BY WEIGHT OF THE MIXTURE, OF A HYDROPHOBIC POLYMERIC POLYAMINE OF MOLECULAR WEIGHT OF 1000-4000 AND NEUTRAL EQUIVALENT OF 200-1000, SAID POLYAMINE BEING A PRODUCT OF THE REDUCTIVE AMINATION OF A MACROMOLECULAR ALIPHATIC POLYKETONE CONTAINING ONLY CARBON, HYDROGEN, AND KETO OXYGEN.
Claim 2
Dependent Claim
105 words
A COMPOSITION CONSISTING ESSENTIALLY OF A BLENDED MIXTURE OF A HYDROPHOBIC ALPHA-PRIMARY MONOAMINOMONOMCARBOXYLIC ACID POLYAMIDE COMPOSED OF MONOAMINOMONOCARBOXYLIC ACID UNITS CONTAINING ONLY CARBON, HYDROGEN, THE ONE AMIDO NITROGEN, AND THE ONE CARBONYL OXYGEN, OF INTRINSIC VISCOSITY, IN POLAR SOLVENTS, OF AT LEAST 0.4, AND HAVING A WATER ABSORPTION OF 100% RELATIVE HUMIDITY AT 25* C. OF LESS THAN 5% WITH FROM 1 TO 25%, BY WEIGHT OF THE MIXTURE, OF A HYDROPHOBIC POLYMERIC POLYAMINE OF MOLECULAR WEIGHT OF 1000-4000 AND NEUTRAL EQUIVALENT OF 200-1000, SAID POLYAMINE BEING A PRODUCT OF THE REDUCTIVE AMINATION OF A MACROMOLECULAR ALIPHATIC POLYKETONE CONTAINING ONLY CARBON, HYDROGEN, AND KETO OXYGEN.
References Cited (Backward Citations)
US2071253A
Cited
US2168336A
Cited
GB502861A
Cited
GB613817A
Cited
GB614063A
Cited
US2527863A
Cited
US2495255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |