US3049528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of butadiene-1, 3 hydrocarbons
Assignee: Goodrich Corp
•
Filing: 1958-12-30
•
Granted: 1962-08-14
•
Expires: 1978-12-30
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Diem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:15
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
THE METHOD OF PRODUCING A HIGH 1,4 POLYME OF A CONJUGATED DIENT HYDROCARBON CONTAINING UP TO 5 CARBON ATOMS, WHICH COMPRISES POLYMERIZING SAID DIENE HYDROCARBON IN A HYDROCARBON SOLVENT AT A TEMPERATURE OF ABOUT 0*C. TO ABOUT 75*C. IN THE PRESENCE OF A FINELY DIVIDED METALLIC CATALYST MADE UP OF AN ALLOY OF LITHIUM AND POTASSIUM METALS IN THE WEIGHT OF AN ALLOY OF LITHIUM 5,000:1 AND ABOUT 20:1, THE PROPORTION OF SAID CATALYST UTILIZED REPRESENTING FROM ABOUT 0.03 PART TO ABOUT 0.5 PART BY WEIGHT, AS METALLIC LITHIUM, PER ABOUT 100 PARTS BY WEIGHT OF SAID CONJUGATED DIENE HYDROCARBON, AND IN THE ADDITIONAL PRESENCE OF METHYL ANILINE TO INHIBIT 1,2 POLYMERIZATION INDUCED BY THE POTASSIUM CONTENT OF SAID CATALYST.
References Cited (Backward Citations)
US1058056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |