US3287334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst systems comprising triethyl aluminum and dichlorotitanium phthalocyanine, with or without an amine
Assignee: WR Grace and Co
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Filing: 1961-04-20
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Granted: 1966-11-22
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Expires: 1981-04-20
Abstract
No abstract record available.
Inventors
- 👤 Edward L Kropa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:53
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; C08F10/00; C08F2/00; C08F2/04; C08F2/06; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE PROCESS OF POLYMERIZING A MEMBER OF THE GROUP CONSISTING OF METHYL METHACRYLATE, STYRENE AND MIXTURE THEREOF WHICH COMPRISES SUBJECTING SAID GROUP MEMBER IN AN INERT ATMOSPHERE IN A LIQUID HYDROCARBON REACTION MEDIUM AT A TEMPERATURE IN THE RANGE 25-125*C. TO THE ACTION OF A CATALYTIC AMOUNT OF A CATALYST CONSISTING ESSENTIALLY OF THE REACTION PRODUCT FORMED BY ADMIXING DICHLOROTITTANIUM PHTHALOCYANINE AND ALUMINUM TRIETHYLE IN A MOLE RATIO IN THE RANGE 1:1 TO 20 RESPECTIVELY.
Claim 2
Dependent Claim
75 words
THE PROCESS OF POLYMERIZING A MEMBER OF THE GROUP CONSISTING OF METHYL METHACRYLATE, STYRENE AND MIXTURE THEREOF WHICH COMPRISES SUBJECTING SAID GROUP MEMBER IN AN INERT ATMOSPHERE IN A LIQUID HYDROCARBON REACTION MEDIUM AT A TEMPERATURE IN THE RANGE 25-125*C. TO THE ACTION OF A CATALYTIC AMOUNT OF A CATALYST CONSISTING ESSENTIALLY OF THE REACTION PRODUCT FORMED BY ADMIXING DICHLOROTITTANIUM PHTHALOCYANINE AND ALUMINUM TRIETHYLE IN A MOLE RATIO IN THE RANGE 1:1 TO 20 RESPECTIVELY.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |