US3178302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thixotropic coating composition
Assignee: Coates Brothers and Co Ltd
•
Filing: 1960-12-21
•
Granted: 1965-04-13
•
Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 Tawn Alec Richard Hornsey
- 👤 Wilson Alec Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:44
CPC Classifications
C; C09; C09D; C09D167/00; C09D167/08; C09D177/00; C09D177/06; C09D177/08; C09D177/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR PRODUCING THIXOTROPIC COATING COMPOSITIONS WHICH COMPRISES (A) FORMING A MIXTURE (1) AN ESTER BODY (2) A FIRST POLYAMIDE OF A POLYMERIC FATTY ACID, AND (3) AN ALIPHATIC, A,W-DIPRIMARY AMINE, (B) HEATING SAID MIXTURE UNTIL IT DEVELOPS THIXOTROPIC PROPERTIES, (C) FURTHER HEATING SAID MIXTURE UNTIL ITS THIXOTROPIC PROPERTIES HAVE PASSED THROUGH A PEAK VALUE AND HAVE BECOME SUBSTANTIALLY DIMINISHED, (D) INCORPORATING INTO THE RESULTING MIXTURE A SECOND POLYAMIDE OF AN ALKYLENE POLYAMINE AND A FATTY ACID SELECTED FROM THE GROUP CONSISTING OF POLYMERIC AND NON-POLYMERIC ACIDS, (E) SAID SECOND POLYAMIDE HAVING A MOLECULAR WEIGHT NOT EXCEEDING 3,000, (F) SAID SECOND POLYAMIDE BEING INCORPORATED WITH SAID MIXTURE AT A TEMPERATURE BELOW 220*C., AND (G) SAID ESTER BODY BEING SELECTED FROM THE GROUP CONSISTING OF ALKYDS, STAND OILS AND OLEORESINOUS VARNISHES.
Claim 2
Dependent Claim
131 words
A PROCESS FOR PRODUCING THIXOTROPIC COATING COMPOSITIONS WHICH COMPRISES (A) FORMING A MIXTURE (1) AN ESTER BODY (2) A FIRST POLYAMIDE OF A POLYMERIC FATTY ACID, AND (3) AN ALIPHATIC, A,W-DIPRIMARY AMINE, (B) HEATING SAID MIXTURE UNTIL IT DEVELOPS THIXOTROPIC PROPERTIES, (C) FURTHER HEATING SAID MIXTURE UNTIL ITS THIXOTROPIC PROPERTIES HAVE PASSED THROUGH A PEAK VALUE AND HAVE BECOME SUBSTANTIALLY DIMINISHED, (D) INCORPORATING INTO THE RESULTING MIXTURE A SECOND POLYAMIDE OF AN ALKYLENE POLYAMINE AND A FATTY ACID SELECTED FROM THE GROUP CONSISTING OF POLYMERIC AND NON-POLYMERIC ACIDS, (E) SAID SECOND POLYAMIDE HAVING A MOLECULAR WEIGHT NOT EXCEEDING 3,000, (F) SAID SECOND POLYAMIDE BEING INCORPORATED WITH SAID MIXTURE AT A TEMPERATURE BELOW 220*C., AND (G) SAID ESTER BODY BEING SELECTED FROM THE GROUP CONSISTING OF ALKYDS, STAND OILS AND OLEORESINOUS VARNISHES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |