US2956995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous process for the production of aliphatic monoolefin polymers
Assignee: Millennium Petrochemicals Inc
•
Filing: 1956-06-28
•
Granted: 1960-10-18
•
Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:16
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A CONTINUOUS PROCESS FOR THE PRODUCTION OF HIGH MOLECULAR WEIGHT POLYMERS BY POLYMERIZATION OF A POLYMERIZABLE ALIPHATIC MONOOLEFIN BY A PEROXYGEN CATALYST AT SUPERATMOSPHERE PRESSURES OF ABOUT 200 ATMOSPHERES IN A PRESSURE RESISTANT REACTION ZONE AND CONTINUOUSLY PASSING THE REACTION ZONE CONTENTS TO A SEPARATION AND RECOVERY ZONE DURING THE COURSE OF WHICH POLYMER PRODUCTION UNPREDICTABLE AND UNCONTROLLABLE DECOMPOSITION PERIODS OCCUR IN SAID REACTION ZONE AND THEREBY PRODUCE SUBSTANTIAL QUANTITIES OF OFF-SPECIFICATION MATERIAL, THE IMPROVEMENT WHICH COMPRISES THE STEPS IN COMBINATION OF, UPON THE INITIATION OF SUCH DECOMPOSITION PERIODS, IMMEDIATELY DISCONTINUING THE HYDROCARBON FEED TO THE REACTION ZONE, INTERRUPTING THE FLOW FROM THE REACTION ZONE TO THE SEPARATION AND RECOVERY ZONE, PASSING THE
Claim 2
Dependent Claim
114 words
IN A CONTINUOUS PROCESS FOR THE PRODUCTION OF HIGH MOLECULAR WEIGHT POLYMERS BY POLYMERIZATION OF A POLYMERIZABLE ALIPHATIC MONOOLEFIN BY A PEROXYGEN CATALYST AT SUPERATMOSPHERE PRESSURES OF ABOUT 200 ATMOSPHERES IN A PRESSURE RESISTANT REACTION ZONE AND CONTINUOUSLY PASSING THE REACTION ZONE CONTENTS TO A SEPARATION AND RECOVERY ZONE DURING THE COURSE OF WHICH POLYMER PRODUCTION UNPREDICTABLE AND UNCONTROLLABLE DECOMPOSITION PERIODS OCCUR IN SAID REACTION ZONE AND THEREBY PRODUCE SUBSTANTIAL QUANTITIES OF OFF-SPECIFICATION MATERIAL, THE IMPROVEMENT WHICH COMPRISES THE STEPS IN COMBINATION OF, UPON THE INITIATION OF SUCH DECOMPOSITION PERIODS, IMMEDIATELY DISCONTINUING THE HYDROCARBON FEED TO THE REACTION ZONE, INTERRUPTING THE FLOW FROM THE REACTION ZONE TO THE SEPARATION AND RECOVERY ZONE, PASSING THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |