US2663649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester modified polyamide resins
Assignee: T F WASHBURN CO
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Filing: 1952-07-01
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Granted: 1953-12-22
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Expires: 1972-07-01
Abstract
No abstract record available.
Inventors
- 👤 William B Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:24
CPC Classifications
C; C09; C09D; C09D177/00; C09D177/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A THIXOTROPIC VEHICLE FOR PROTECTIVE COATINGS COMPRISING A PRODUCT OBTAINED BY HEATING A POLYAMIDE RESIN HAVING A MOLECULAR WEIGHT BETWEEN APPROXIMATELY 3000 AND 9000 WHICH IS FORMED BY THE REACTION OF DIMERIZED AND TRIMERIZED UNSATURATED FAT ACIDS WITH AN ALKYLENE POLYAMINE WITH TWO TO FOUR AMINE SUBSTITUENTS, AND A VEHICLE SELECTD FROM THE GROUP CONSSTING OF GLYCERIDE OILS, OIL-MODIFIED ALKYD RESINS AND VARNISH ESTER BODIES AT A TEMPERATURE ABOVE THE MELTING POINT OF SAID POLYAMIDE RESIN BUT BELOW 600* F. UNTIL A ONE PART SAMPLE MIXED WITH NINE PARTS OF MINERAL SPIRITS WHEN COOLED TO ROOM TEMPERATURE SHOWS NO GRAININESS, AND HAS MAXIMUM TURBIDITY AND A CLOUDY APPEARANCE.
Claim 2
Dependent Claim
108 words
A THIXOTROPIC VEHICLE FOR PROTECTIVE COATINGS COMPRISING A PRODUCT OBTAINED BY HEATING A POLYAMIDE RESIN HAVING A MOLECULAR WEIGHT BETWEEN APPROXIMATELY 3000 AND 9000 WHICH IS FORMED BY THE REACTION OF DIMERIZED AND TRIMERIZED UNSATURATED FAT ACIDS WITH AN ALKYLENE POLYAMINE WITH TWO TO FOUR AMINE SUBSTITUENTS, AND A VEHICLE SELECTD FROM THE GROUP CONSSTING OF GLYCERIDE OILS, OIL-MODIFIED ALKYD RESINS AND VARNISH ESTER BODIES AT A TEMPERATURE ABOVE THE MELTING POINT OF SAID POLYAMIDE RESIN BUT BELOW 600* F. UNTIL A ONE PART SAMPLE MIXED WITH NINE PARTS OF MINERAL SPIRITS WHEN COOLED TO ROOM TEMPERATURE SHOWS NO GRAININESS, AND HAS MAXIMUM TURBIDITY AND A CLOUDY APPEARANCE.
References Cited (Backward Citations)
US2379413A
Cited
US2450940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |