US3206438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interfacial preparation of polyamides with water insoluble inorganic compounds as acid binders
Assignee: Celanese Corp
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Filing: 1961-01-10
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Granted: 1965-09-14
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Expires: 1981-01-10
Abstract
No abstract record available.
Inventors
- 👤 Jamison Saunders Eliot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:18
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/28; C08G69/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A PROCESS OF FORMING A HIGH MOLECULAR WEIGHT CONDENSATION POLYMER CAPABLE OF BEIG FORMED INTO SHAPED ARTICLES BY THE REACTION OF A DIAMINE HAVING AN AMINO HYDROGEN ON EACH AINO GROUP AND A DICARBOXYLIC ACID DIHALIDE, WHEREIN SAID DIAMINE DISSOLVED IN WATER IS CONTACTED WITH SAID DIHALIDE DISSOLVED IN A WATER-IMMISCIBLE ORGANIC SOLVENT, TO EFFECT SAID REACTION AT THE INTERFACE OF THE RESULTING IMMISCRIBLE LIQUID PHASES WITH THE FORMATION OF A HYDROGEN HALIDE BY-PRODUCT, THE IMPROVEMENT COMPRISING CARRYING OUT SAID REACTION IN THE PRESENCE OF AN ACID-BINDER SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE, MAGNESIUM HYDROXIDE, MAGNESIUM CARBONATE, CALCIUM CARBONATE, AND BARIUM CARBONATE.
Claim 2
Dependent Claim
105 words
IN A PROCESS OF FORMING A HIGH MOLECULAR WEIGHT CONDENSATION POLYMER CAPABLE OF BEIG FORMED INTO SHAPED ARTICLES BY THE REACTION OF A DIAMINE HAVING AN AMINO HYDROGEN ON EACH AINO GROUP AND A DICARBOXYLIC ACID DIHALIDE, WHEREIN SAID DIAMINE DISSOLVED IN WATER IS CONTACTED WITH SAID DIHALIDE DISSOLVED IN A WATER-IMMISCIBLE ORGANIC SOLVENT, TO EFFECT SAID REACTION AT THE INTERFACE OF THE RESULTING IMMISCRIBLE LIQUID PHASES WITH THE FORMATION OF A HYDROGEN HALIDE BY-PRODUCT, THE IMPROVEMENT COMPRISING CARRYING OUT SAID REACTION IN THE PRESENCE OF AN ACID-BINDER SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE, MAGNESIUM HYDROXIDE, MAGNESIUM CARBONATE, CALCIUM CARBONATE, AND BARIUM CARBONATE.
References Cited (Backward Citations)
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US2708617A
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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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |