Patent US3141787A successfully refreshed from Google Patents.
US3141787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thixotropic agents and preparation thereof
Assignee: General Mills Inc
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Filing: 1960-07-25
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Granted: 1964-07-21
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Expires: 1980-07-25
Abstract
No abstract record available.
Inventors
- 👤 Goetze Wolfgang
- 👤 Griebsch Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:47
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR PREPARING A MODIFIED EASILY SOLUBLE POLYAMIDE FOR USE AS A THIXOTROPIC ADDITIVE WHICH PROCESS COMPRISES CONDENSING AN ALKYLENE POLYAMINE WITH AN STOICHIOMETRIC EXCESS OF AN ACID SELECTED FROM THE GROUP CONSISTING OF POLYCARBOXYLIC ACIDS HAVING MORE THAN 6 CARBON ATOMS AND MIXTURES THEREOF WITH MONOCARBOXYLIC FATTY ACIDS HAVING MORE THAN 6 CARBON ATOMS, THE ALKYL ESTERS THEREOF AND SUBSEQUENTLY ESTERIFYING THE PRODUCT WITH A MONOALCOHOL UNTIL THE ACID VALUE IS LESS THAN 10.
Claim 2
Dependent Claim
76 words
A PROCESS FOR PREPARING A MODIFIED EASILY SOLUBLE POLYAMIDE FOR USE AS A THIXOTROPIC ADDITIVE WHICH PROCESS COMPRISES CONDENSING AN ALKYLENE POLYAMINE WITH AN STOICHIOMETRIC EXCESS OF AN ACID SELECTED FROM THE GROUP CONSISTING OF POLYCARBOXYLIC ACIDS HAVING MORE THAN 6 CARBON ATOMS AND MIXTURES THEREOF WITH MONOCARBOXYLIC FATTY ACIDS HAVING MORE THAN 6 CARBON ATOMS, THE ALKYL ESTERS THEREOF AND SUBSEQUENTLY ESTERIFYING THE PRODUCT WITH A MONOALCOHOL UNTIL THE ACID VALUE IS LESS THAN 10.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |