US3294773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control scheme for polyethylene reactor
Assignee: Halcon Research and Development Corp
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Filing: 1965-08-12
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Granted: 1966-12-27
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Expires: 1985-08-12
Abstract
No abstract record available.
Inventors
- 👤 Gans Manfred
- 👤 Robert S Davis
- 👤 Eugene C Su
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:51
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/243; C; C08; C08F; C08F10/00; B01J2219/00; B01J2219/00002; B01J2219/00004; B01J2219/00006; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00191; Y; Y10; Y10S; Y10S526/00; Y10S526/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A CYCLIC PROCESS FOR THE POLYMERIZATION OF ETHYLENE UNDER HIGH PRESSURE IN AN ELONGATED REACTOR, WHEREIN THE REACTION MIXTURE IS MAINTAINED AT A RELATIVELY CONSTANT PRESSURE FOR A PERIOD OF TIME AND IN ADDITION, SUBJECTED TO REGULAR FLOW PULSES AT LEAST ONCE EVERY TWO MINUTES, SUCH THAT FOR EACH PULSE THERE IS AT LEAST A TWOFOLD INCREASE IN LINEAR VELOCIY OF THE MIXTURE THROUGH THE REACTOR, THE IMPROVEMENT WHICH COMPRISES: ADJUSTING THE PERIOD DURING WHICH A RELATIVELY CONSTANT PRESSURE IS MAINTAINED ACCORDING TO THE DEGREE-OF-PLUGGING FACTOR OF THE PREVIOUS PULSE, SO THAT IF SAID FACTOR FOR THE PERVIOUS PULSE IS SMALLER THAN ITS PREDECESSOR, THE SAID PERIOD IS MADE LONGER AND VICE VERSA.
Claim 2
Dependent Claim
114 words
IN A CYCLIC PROCESS FOR THE POLYMERIZATION OF ETHYLENE UNDER HIGH PRESSURE IN AN ELONGATED REACTOR, WHEREIN THE REACTION MIXTURE IS MAINTAINED AT A RELATIVELY CONSTANT PRESSURE FOR A PERIOD OF TIME AND IN ADDITION, SUBJECTED TO REGULAR FLOW PULSES AT LEAST ONCE EVERY TWO MINUTES, SUCH THAT FOR EACH PULSE THERE IS AT LEAST A TWOFOLD INCREASE IN LINEAR VELOCIY OF THE MIXTURE THROUGH THE REACTOR, THE IMPROVEMENT WHICH COMPRISES: ADJUSTING THE PERIOD DURING WHICH A RELATIVELY CONSTANT PRESSURE IS MAINTAINED ACCORDING TO THE DEGREE-OF-PLUGGING FACTOR OF THE PREVIOUS PULSE, SO THAT IF SAID FACTOR FOR THE PERVIOUS PULSE IS SMALLER THAN ITS PREDECESSOR, THE SAID PERIOD IS MADE LONGER AND VICE VERSA.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |