Patent US3679368A successfully refreshed from Google Patents.
US3679368A
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Continuous polyester polymerization apparatus
Assignee: Honeywell International Inc
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Filing: 1969-10-20
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Granted: 1972-07-25
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Expires: 1989-10-20
Abstract
Abstract APPARATUS FOR CONTINUOUS ESTERIFICATION AND POLYCONDENSATION COMPRISING A RECTIFICATION UNIT HAVING A FEED OUTLET THEREFROM TO A MULTIPLE ZONE SUBSTANTIAL VERTICAL ESTERIFICATION MEANS CONTAINING AGITATORS AND WEIRS (WHEREIN SAID AGITATORS ARE CONICAL IN SHAPE) AND INTERPOSITIONED WITH RESPECT TO SAID WEIRS, AND DEVOLATILIZATION MEANS LOCATED BETWEEN SAID MULTIPLE ZONE ESTERIFICATION MEANS AND A PLUG FLOW MEANS.
Inventors
- 👤 Laszlo J Balint
- 👤 David W H Roth Jr
- 👤 Orvill E Snider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:26
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1862; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0895; C08G63/00; C08G63/78; C08G63/785; C08G69/00; C08G69/02; C08G69/04; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00159; B01J2219/00162; B01J2219/00168; Y; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S159/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |