Patent US3287342A successfully refreshed from Google Patents.
US3287342A
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Process for visbreaking polyolefins
Assignee: Phillips Petroleum Co
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Filing: 1963-05-09
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Granted: 1966-11-22
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Expires: 1983-05-09
Abstract
No abstract record available.
Inventors
- 👤 Roger J Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:09
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/50; C08F2810/00; C08F2810/10; Y; Y10; Y10S; Y10S526/00; Y10S526/914
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
IN A PROCESS WHEREIN A NORMALLY SOID POLYMER OF MONO-1-OLEFIN IS SUBJECTED TO VISBREAKING, THEIMPROVEMENT COMPRISING CARRYING OUT SAID VISBREAKING AT A TEMPERATURE IN THE RANGE OF .357* TO 900*F. IN THE PRESENCE OF AN ADDITIVE ADDED TO AND ADMIXED WITH SAID POLYMER IN AN AMOUNT SUFFICIENT TO ACCELERATE SAID VISBREAKING, SAID ADDITIVE HAVNG THE GENERAL STRUCTURE:
References Cited (Backward Citations)
US3098845A
Cited
US3037012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |