US2982758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous bulk polymerization process
Assignee: Celanese Corp
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Filing: 1957-10-24
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Granted: 1961-05-02
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Expires: 1977-10-24
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Michaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:49
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR POLYMERIZING TRIOXANE WHICH COMPRISES INTIMATELY ADMIXING MOLTEN TRIOXANE AND A POLYMERIZATION CATALYST THEREFOR AND PARTIALLY POLYMERIZING SAID TRIOXANE IN A FIRST REACTION ZONE, WITHDRAWING A MIXTURE OF TRIOXANE POLYMER, UNREACTED TRIOXANE AND POLYMERIZATION CATALYST FROM FIRST REACTION ZONE, DISTRIBUTING SAID MIXTURE AS A LAYER ON A SOLID SURFACE IN A SECOND REACTION ZONE HEATED TO POLYMERIZATION TEMPERATURE
Claim 2
Dependent Claim
60 words
A PROCESS FOR POLYMERIZING TRIOXANE WHICH COMPRISES INTIMATELY ADMIXING MOLTEN TRIOXANE AND A POLYMERIZATION CATALYST THEREFOR AND PARTIALLY POLYMERIZING SAID TRIOXANE IN A FIRST REACTION ZONE, WITHDRAWING A MIXTURE OF TRIOXANE POLYMER, UNREACTED TRIOXANE AND POLYMERIZATION CATALYST FROM FIRST REACTION ZONE, DISTRIBUTING SAID MIXTURE AS A LAYER ON A SOLID SURFACE IN A SECOND REACTION ZONE HEATED TO POLYMERIZATION TEMPERATURE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |