US3192184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prepolymerization process
Assignee: EIDP Inc
•
Filing: 1959-03-19
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Granted: 1965-06-29
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Expires: 1979-03-19
Abstract
No abstract record available.
Inventors
- 👤 Brill John Lewis
- 👤 Izard Emmette Farr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:25
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/78; C08G63/785
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR CONTINUOUSLY PRODUCING A PREPOLYMER OF BIS-2-HYDROXY ETHYL TEREPHTHALATE WHICH COMPRISES CONTINUOUSLY FLOWING A POLYMERIZABLE LIQUID FROM THE GROUP CONSISTING OF BIS-2-HYDROXY ETHYL TEREPHTHALATE AND LOW MOLECULAR WEIGHT POLYMERS THEREOF HAVING AN INTRINSIC VISCOSITY NOT GREATER THAN 0.25 DOWNWARDLY AND SOLELY BY FORCE OF GRAVITY OVER A SUBSTANTIALLY VERTICAL STATIONARY SURFACE PROVIDED WITH PROTUBERANCES DEFINING SYMMETRICALLY PATTERNED CHANNELS EFFECTIVE TO PROMOTE DISTRIBUTION OF THE LIQUID AS A FILM OVER SUBSTANTIALLY THE ENTIRE AREA OF
Claim 2
Dependent Claim
76 words
A PROCESS FOR CONTINUOUSLY PRODUCING A PREPOLYMER OF BIS-2-HYDROXY ETHYL TEREPHTHALATE WHICH COMPRISES CONTINUOUSLY FLOWING A POLYMERIZABLE LIQUID FROM THE GROUP CONSISTING OF BIS-2-HYDROXY ETHYL TEREPHTHALATE AND LOW MOLECULAR WEIGHT POLYMERS THEREOF HAVING AN INTRINSIC VISCOSITY NOT GREATER THAN 0.25 DOWNWARDLY AND SOLELY BY FORCE OF GRAVITY OVER A SUBSTANTIALLY VERTICAL STATIONARY SURFACE PROVIDED WITH PROTUBERANCES DEFINING SYMMETRICALLY PATTERNED CHANNELS EFFECTIVE TO PROMOTE DISTRIBUTION OF THE LIQUID AS A FILM OVER SUBSTANTIALLY THE ENTIRE AREA OF
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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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |