US3207739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer crystallization method
Assignee: Shell USA Inc
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Filing: 1962-04-26
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Granted: 1965-09-21
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Expires: 1982-04-26
Abstract
No abstract record available.
Inventors
- 👤 Wales Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:59
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF CRYSTALLIZING CRYSTALLIZABLE POLYPROPYLENE WHICH COMPRISES (A) PRODUCING A MELT OF (A) NORMALLY SOLID CRYSTALLIZABLE POLYPROPYLENE CONTAINING (B) AN EFFECTIVE AMOUNT, IN THE RANGE FROM 0.0001 TO 2 PERCENT BY WEIGHT, OF A CRYSTALLIZATION MODIFYING SALT NAMX WHERE M IS THE VALENCE OF X, AND X IS THE ANION OF A CARBOXYLIC ACID FROM THE FOLLOWING GROUP: (1) CYCLIC MONOCARBOXYLIC ACIDS, FREE OF OLEFINIC UNSATURATION, WHOSE CARBOXYL GROUP IS ATTACHED TO A CARBON ATOM OF A 5- TO 6MEMBERED RING; (2) POLYCARBOXYLIC ACIDS SELECTED FROM THE FOLLOWING GROUP: (I) AROMATIC POLYCARBOXYLIC ACIDS HAVING FROM 2 TO 4 CARBOXYL GROUPS PER MOLECULE AND FREE OF OLEFINIC UNSATURATION, (II) SATURATAED CYCLOALIPHATIC DICARBOXYLIC ACIDS, (III) SATURATED ALIPHATIC AND SATURATED HYDROCARBON-SUBSTITUTED ALIPHATIC TERMINAL DICARBOXYLIC ACIDS HAVING FROM 4 TO 12 CARBON ATOMS PER MOLECULE; AND (3) TERMINAL ALIPHATIC MONOCARBOXYLIC ACIDS SUBSTITUTED WITH AT LEAST ONE CARBOXYCLIC GROUP PER MOLECULE; (B) AND SOLIDIFYING SAID MELT BY COOLING IT.
Claim 2
Independent Claim
155 words
THE METHOD OF CRYSTALLIZING CRYSTALLIZABLE POLYPROPYLENE WHICH COMPRISES (A) PRODUCING A MELT OF (A) NORMALLY SOLID CRYSTALLIZABLE POLYPROPYLENE CONTAINING (B) AN EFFECTIVE AMOUNT, IN THE RANGE FROM 0.0001 TO 2 PERCENT BY WEIGHT, OF A CRYSTALLIZATION MODIFYING SALT NAMX WHERE M IS THE VALENCE OF X, AND X IS THE ANION OF A CARBOXYLIC ACID FROM THE FOLLOWING GROUP: (1) CYCLIC MONOCARBOXYLIC ACIDS, FREE OF OLEFINIC UNSATURATION, WHOSE CARBOXYL GROUP IS ATTACHED TO A CARBON ATOM OF A 5- TO 6MEMBERED RING; (2) POLYCARBOXYLIC ACIDS SELECTED FROM THE FOLLOWING GROUP: (I) AROMATIC POLYCARBOXYLIC ACIDS HAVING FROM 2 TO 4 CARBOXYL GROUPS PER MOLECULE AND FREE OF OLEFINIC UNSATURATION, (II) SATURATAED CYCLOALIPHATIC DICARBOXYLIC ACIDS, (III) SATURATED ALIPHATIC AND SATURATED HYDROCARBON-SUBSTITUTED ALIPHATIC TERMINAL DICARBOXYLIC ACIDS HAVING FROM 4 TO 12 CARBON ATOMS PER MOLECULE; AND (3) TERMINAL ALIPHATIC MONOCARBOXYLIC ACIDS SUBSTITUTED WITH AT LEAST ONE CARBOXYCLIC GROUP PER MOLECULE; (B) AND SOLIDIFYING SAID MELT BY COOLING IT.
References Cited (Backward Citations)
US2838437A
Cited
US3029363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |