Patent US3334070A successfully refreshed from Google Patents.
US3334070A
Expired / Lapsed
US
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Production of finely divided particles of synthetic polymers
Assignee: Rhodiaceta SA
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Filing: 1962-05-23
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Granted: 1967-08-01
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Expires: 1982-05-23
Abstract
No abstract record available.
Inventors
- 👤 Jean Claude Chezaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:58
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; C; C08; C08G; C08G63/00; C08G63/88; C08G63/89; C08J; C08J3/00; C08J3/12; C08J9/00; C08J9/26; C08L; C08L67/00; C08L67/02; D21; D21H; D21H13/00; D21H13/10; D21H13/20; D21H13/24; D21H13/26; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55; D21H21/00; D21H21/50; D21H21/52; C08J2367/00; C08J2367/02; C08J2377/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
PROCESS FOR THE PRODUCTION OF FINELY DIVIDED PARTICLES OF LINEAR SYNTHETIC THERMOPLASTIC POLYMERS BY FORMING AN INTIMATE MIXTURE OF A POLYMER SELECTED FROM THE GROUP WHICH CONSISTS OF LINEAR POLYAMIDES AND LINEAR POLYSTERS AND A SOLID SUBSTANCE WHICH IS INERT TOWARDS THE SAID POLYMER, WHICH COMPRISES FORMING A GEL OF THE SAID POLYMER, PRODUCING THEREFROM AN INTIMATE MIXTURE OF THE SAID GEL AND OF A SOLID SUBSTANCE SELECTED FROM THE GROUP WHICH CONSISTS OF SODIUM CHLORIDE, AND SODIUM SULPHATE, THE RATIO BY WEIGHT OF THE SAID SOLID SUBSTANCE TO THE POLYMER GEL BEING AT LEAST 1:1, DISPERSING THE MIXTURE SO OBTAINED IN AN AQUEOUS MEDIUM IN WHICH THE SAID SOLID SUBSTANCE FORMS A SOLUTION, AND SEPARATING FROM THE AQUEOUS MEDIUM THE FINE PARTICLES OF POLYMER SO FORMED.
Claim 2
Dependent Claim
127 words
PROCESS FOR THE PRODUCTION OF FINELY DIVIDED PARTICLES OF LINEAR SYNTHETIC THERMOPLASTIC POLYMERS BY FORMING AN INTIMATE MIXTURE OF A POLYMER SELECTED FROM THE GROUP WHICH CONSISTS OF LINEAR POLYAMIDES AND LINEAR POLYSTERS AND A SOLID SUBSTANCE WHICH IS INERT TOWARDS THE SAID POLYMER, WHICH COMPRISES FORMING A GEL OF THE SAID POLYMER, PRODUCING THEREFROM AN INTIMATE MIXTURE OF THE SAID GEL AND OF A SOLID SUBSTANCE SELECTED FROM THE GROUP WHICH CONSISTS OF SODIUM CHLORIDE, AND SODIUM SULPHATE, THE RATIO BY WEIGHT OF THE SAID SOLID SUBSTANCE TO THE POLYMER GEL BEING AT LEAST 1:1, DISPERSING THE MIXTURE SO OBTAINED IN AN AQUEOUS MEDIUM IN WHICH THE SAID SOLID SUBSTANCE FORMS A SOLUTION, AND SEPARATING FROM THE AQUEOUS MEDIUM THE FINE PARTICLES OF POLYMER SO FORMED.
References Cited (Backward Citations)
US2544483A
Cited
US2795008A
Cited
US2822350A
Cited
FR1199550A
Cited
US3062760A
Cited
US3203911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |