Patent US3728325A successfully refreshed from Google Patents.
US3728325A
Expired / Lapsed
US
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Polymerization of conjugated polyolefins
Assignee: Goodrich Corp
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Filing: 1955-04-21
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Granted: 1973-04-17
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Expires: 1975-04-21
Abstract
Abstract CONJUGATED POLYOLEFIN HYDROCARBONS ARE POLYMERIZED TO RUBBERY OR RESINOUS POLYMERS HAVING ESSENTIALLY AN ALL 1,4 STRUCTURE WITH CATALYSTS CONTAINING TITANIUM COMPOUNDS. THE CIS- AND TRANS-1,4-RATIOS CAN BE VARIED BY ADJUSTMENT OF THE TITANIUM TO ALUMINUM RATIO OF THE CATALYST.
Inventors
- 👤 C Carlson
- 👤 S Horne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:27
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |