US2768090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide resin suspensoids with reversed charges
Assignee: General Mills Inc
•
Filing: 1951-04-09
•
Granted: 1956-10-23
•
Expires: 1971-04-09
Abstract
No abstract record available.
Inventors
- 👤 Wittcoff Harold
- 👤 Malcolm M Renfrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:05
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2377/00; C08J2377/06; C08J2377/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
PROCESS OF PRODUCING AN ANIONICALLY DISPERSED SUSPENSOID IN AN AQUEOUS MEDIUM OF A POLYAMIDE HAVING THE POLYACYL GROUP OF POLYMERIC FATTY ACIDS AND THE POLYAMINO GROUP OF AN ALIPHATIC POLYAMINE, THE POLYAMIDE HAVING A MOLECULAR WEIGHT WITHIN THE APPROXIMATE RANGE OF 1,000 TO 10,000, SAID POLYAMIDE HAVING AN AMINE NUMBER OF AT LEAST 1, WHICH COMPRISES FIRST DISPERSING SAID POLYAMIDE CATIONICALLY IN AN AQUEOUS MEDIUM BY MEANS OF SUFFICIENT ACID TO REACT WITH FREE AMINE GROUPS IN THE POLYAMIDE TO FORM INTRINSIC AMINE SALTS GROUPS WHICH EFFECT A CATIONIC SUSPENSOID OF THE POLYAMIDE, AND THEN CONVERTING SAID CATIONIC SUSPENSOID TO AN ANIONIC SUSPENSOID BY ADDING THERETO A QUANTITY OF ANIONIC EMULSIFIER GREATER THAN IS NECESSARY TO NEUTRALIZE STOICHIOMETRICALLY THE AMOUNT OF ACID USED TO FORMED AN AMINE SALT IN THE ORIGINAL CATIONIC DISPERSION.
Claim 2
Dependent Claim
133 words
PROCESS OF PRODUCING AN ANIONICALLY DISPERSED SUSPENSOID IN AN AQUEOUS MEDIUM OF A POLYAMIDE HAVING THE POLYACYL GROUP OF POLYMERIC FATTY ACIDS AND THE POLYAMINO GROUP OF AN ALIPHATIC POLYAMINE, THE POLYAMIDE HAVING A MOLECULAR WEIGHT WITHIN THE APPROXIMATE RANGE OF 1,000 TO 10,000, SAID POLYAMIDE HAVING AN AMINE NUMBER OF AT LEAST 1, WHICH COMPRISES FIRST DISPERSING SAID POLYAMIDE CATIONICALLY IN AN AQUEOUS MEDIUM BY MEANS OF SUFFICIENT ACID TO REACT WITH FREE AMINE GROUPS IN THE POLYAMIDE TO FORM INTRINSIC AMINE SALTS GROUPS WHICH EFFECT A CATIONIC SUSPENSOID OF THE POLYAMIDE, AND THEN CONVERTING SAID CATIONIC SUSPENSOID TO AN ANIONIC SUSPENSOID BY ADDING THERETO A QUANTITY OF ANIONIC EMULSIFIER GREATER THAN IS NECESSARY TO NEUTRALIZE STOICHIOMETRICALLY THE AMOUNT OF ACID USED TO FORMED AN AMINE SALT IN THE ORIGINAL CATIONIC DISPERSION.
References Cited (Backward Citations)
US2143986A
Cited
US1910547A
Cited
US2138226A
Cited
US2342387A
Cited
US2335930A
Cited
US2450940A
Cited
US2630397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |