Patent US6428576B1 successfully refreshed from Google Patents.
US2665197A
Expired / Lapsed
US
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Polymerization control apparatus
Assignee: Individual
•
Filing: 1950-08-03
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Granted: 1954-01-05
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Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 Rowland Ernest Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:17
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
APPARATUS FOR THE CONTINUOUS OPERATION OF A POLYMERIZATION PROCESS COMPRISING MEANS PROVINDING A REACTOR CHAMBER HAVING AN ELONGATED GENERALLY VERTICALLY DISPOSED PASSAGEWAY, MEANS FOR INTRODUCING LIQUID CHARGE MATERIAL INTO THE UPPER PORTION OF SAID CHAMBER, A MIXTURE DEVICE IN SAID PASSAGEWAY, POWER MEANS FOR MOVING SAID MIXING DEVICE, VARIABLE MEANS RESTRICTING AND CONTROLLING THE DISCHARGE OF PRODUCT FROM THE LOWER END OF SAID CHAMBER, A CONTROL DEVICE RESPONSIVE TO THE RESISTANCE OF THE CHARGE MATERIAL IN SAID PASSAGEWAY EXERTED AGAINST SAID MIXING DEVICE, AND AN OPERATIVE CONNECTION BE-
Claim 2
Dependent Claim
88 words
APPARATUS FOR THE CONTINUOUS OPERATION OF A POLYMERIZATION PROCESS COMPRISING MEANS PROVINDING A REACTOR CHAMBER HAVING AN ELONGATED GENERALLY VERTICALLY DISPOSED PASSAGEWAY, MEANS FOR INTRODUCING LIQUID CHARGE MATERIAL INTO THE UPPER PORTION OF SAID CHAMBER, A MIXTURE DEVICE IN SAID PASSAGEWAY, POWER MEANS FOR MOVING SAID MIXING DEVICE, VARIABLE MEANS RESTRICTING AND CONTROLLING THE DISCHARGE OF PRODUCT FROM THE LOWER END OF SAID CHAMBER, A CONTROL DEVICE RESPONSIVE TO THE RESISTANCE OF THE CHARGE MATERIAL IN SAID PASSAGEWAY EXERTED AGAINST SAID MIXING DEVICE, AND AN OPERATIVE CONNECTION BE-
References Cited (Backward Citations)
US1320323A
Cited
US2122805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |