Patent US3657209A successfully refreshed from Google Patents.
US3657209A
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Polymeric material and method of preparing same
Assignee: Goodrich Gulf Chemicals Inc
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Filing: 1955-04-21
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Granted: 1972-04-18
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Expires: 1975-04-21
Abstract
Abstract THIS INVENTION IS CONCERNED WITH THE POLYMERIZATION OF BUTADIENCE IN AN INERT LIQUID HYDROCARBON IN THE PRESENCE OF 0.5 TO 20% BY WEIGHT OF BUTADIECE OF A CATALYST COMPRISING TICL4 AND ALR''R"R"''.
Inventors
- 👤 Earl J Carlson
- 👤 Samuel E Horne Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:23
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06; C08F10/00; C08F136/08; C08F236/00; C08F236/02; C08F236/04; C08F236/08; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |