Patent US3203911A successfully refreshed from Google Patents.
US3203911A
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Process for the production of finely divided particles of synthetic interpolyamides
Assignee: Rhodiaceta SA
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Filing: 1962-03-01
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Granted: 1965-08-31
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Expires: 1982-03-01
Abstract
No abstract record available.
Inventors
- 👤 Goullioud Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:32
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55; C08J2377/00; Y; Y10; Y10S; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
PROCESS FOR THE PRODUCTIN OF FINELY DIVIDED PARTICLES OF INTERPOLYAMIDES HAVING HIGH WATER RETENTIVE POWER, SAID INTERPOLYAMIDES BEING FORMED BY COPOLYMERIZED AT LEAST ONE DIAMINE, AT LEAST ONE DICARBOXYLIC ACID AND AT LEAST ONE MONOAMINOMONOCARBOXYLIC ACID, WHICH COMPRISES SWELLILNG GRAINS OF THE SAID INTERPOLYAMIDE WITH A SWELLING AGENT WHICH UNDER THE CONDITIONS USED DOES NOT DISSOLVE THE INTERPOLYAMIDE, MECHANICALLY DISINTEGRATING THE RESULTANT SWOLLEN GRAINS, AND THEN REMOVING THE SWELLING AGENT, THE TEMPERATURE THROUGHOUT BEING BELOW THAT AT WHICH THE INTERPOLYAMIDE BECOMES MOLTEN.
Claim 2
Dependent Claim
82 words
PROCESS FOR THE PRODUCTIN OF FINELY DIVIDED PARTICLES OF INTERPOLYAMIDES HAVING HIGH WATER RETENTIVE POWER, SAID INTERPOLYAMIDES BEING FORMED BY COPOLYMERIZED AT LEAST ONE DIAMINE, AT LEAST ONE DICARBOXYLIC ACID AND AT LEAST ONE MONOAMINOMONOCARBOXYLIC ACID, WHICH COMPRISES SWELLILNG GRAINS OF THE SAID INTERPOLYAMIDE WITH A SWELLING AGENT WHICH UNDER THE CONDITIONS USED DOES NOT DISSOLVE THE INTERPOLYAMIDE, MECHANICALLY DISINTEGRATING THE RESULTANT SWOLLEN GRAINS, AND THEN REMOVING THE SWELLING AGENT, THE TEMPERATURE THROUGHOUT BEING BELOW THAT AT WHICH THE INTERPOLYAMIDE BECOMES MOLTEN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |