US2631142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst activator for diolefin polymerization
Assignee: Polysar Ltd
•
Filing: 1949-06-15
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Granted: 1953-03-10
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Expires: 1969-06-15
Abstract
No abstract record available.
Inventors
- 👤 Williams Harry Leverne
- 👤 Mitchell Joseph Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:15
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE PROCESS WHICH COMPRISES CAUSING SUBSTANCES SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-1,3 AND ADMIXTURES THEREOF WITH COPOLYMERIZABLE COMPOUNDS TO POLYMERIZE AT A LOW TEMPERATURE WITH A PEROXY INITIATOR IN AQUEOUS EMULSION IN THE PRESENCE OF A WATER-SOLUBLE ORGANIC CHELATE COMPLEX OF A SALT OF ETHYLENE DINITRILO TETRA ACETIC ACID AND IRON AND AN ALKALI METAL.
Claim 2
Dependent Claim
56 words
THE PROCESS WHICH COMPRISES CAUSING SUBSTANCES SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-1,3 AND ADMIXTURES THEREOF WITH COPOLYMERIZABLE COMPOUNDS TO POLYMERIZE AT A LOW TEMPERATURE WITH A PEROXY INITIATOR IN AQUEOUS EMULSION IN THE PRESENCE OF A WATER-SOLUBLE ORGANIC CHELATE COMPLEX OF A SALT OF ETHYLENE DINITRILO TETRA ACETIC ACID AND IRON AND AN ALKALI METAL.
References Cited (Backward Citations)
US2578910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |