US2947737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of conjugated diolefines with a catalyst comprising metallic lithium dispersed in a crystalline salt
Assignee: Bridgestone Firestone Inc
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Filing: 1956-02-08
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Granted: 1960-08-02
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Expires: 1976-02-08
Abstract
No abstract record available.
Inventors
- 👤 Richard S Stearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:29
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
PROCESS WHICH CONPRISES CONTACTING A SUBSTANCE, SELECTED FROM THE GROUP CONSISTING OF CONJUGATED DIOLEFINES AND MIXTURES THEREOF WITH STYRENE AND WITH ALPHA-METHYL STYRENE, WITH A CATALYST COMPRISING A CRYSTALLINE SALT HAVING REDUCED METALLIC LITHIUM DISPERSED IN THE CRYSTAL LATTIC THEREOF SO AS TO EXHIBIT A BLUE COLORATION.
Claim 2
Dependent Claim
47 words
PROCESS WHICH CONPRISES CONTACTING A SUBSTANCE, SELECTED FROM THE GROUP CONSISTING OF CONJUGATED DIOLEFINES AND MIXTURES THEREOF WITH STYRENE AND WITH ALPHA-METHYL STYRENE, WITH A CATALYST COMPRISING A CRYSTALLINE SALT HAVING REDUCED METALLIC LITHIUM DISPERSED IN THE CRYSTAL LATTIC THEREOF SO AS TO EXHIBIT A BLUE COLORATION.
References Cited (Backward Citations)
US1058056A
Cited
GB342107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |