US3254053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trioxane polymerization process and apparatus
Assignee: Celanese Corp
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Filing: 1962-10-15
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Granted: 1966-05-31
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Expires: 1982-10-15
Abstract
No abstract record available.
Inventors
- 👤 Gene J Fisher
- 👤 Brown Frank
- 👤 Walter E Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:04
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/10; C08G2/18; C08G2/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR THE POLYMERIZATION OF TRIOXANE WHICH COMPRISES (A) PREPARING A POLYMERIZATION MIXTURE COMPRISING AT LEAST 50 WEIGHT PRCEENT OF TRIOXANE AND A POLYMERIZATION CATALYST THEREFOR, (B) MAINTAINING SAID MIXTURE IN A POLYMERIZATION REACTOR FOR A PERIOD SUFFICIENT TO CONVERT SUFFICIENT TRIOXANE TO POLYMERIC FORM SO THAT A SOLIDIFIED MASS WOULD BE FORMED IN THE ABSENCE OF A VIGOROUS MIXING AND SHEARING ACTION AND (C) EXERTING A VIGOROUS MIXING AND SHEARING ACTION ON SAID MIXTURE THROUGHOUT SAID POLYMERIZATION PERIOD SUCH THAT (1) THE FORMATION OF A SOLIDIFIED MASS IS PREVENTED AND (2) SAID POLYMER IS IN A FINELY DIVIDED FORM UPON LEAVING SAID REACTION ZONE.
Claim 2
Dependent Claim
106 words
A PROCESS FOR THE POLYMERIZATION OF TRIOXANE WHICH COMPRISES (A) PREPARING A POLYMERIZATION MIXTURE COMPRISING AT LEAST 50 WEIGHT PRCEENT OF TRIOXANE AND A POLYMERIZATION CATALYST THEREFOR, (B) MAINTAINING SAID MIXTURE IN A POLYMERIZATION REACTOR FOR A PERIOD SUFFICIENT TO CONVERT SUFFICIENT TRIOXANE TO POLYMERIC FORM SO THAT A SOLIDIFIED MASS WOULD BE FORMED IN THE ABSENCE OF A VIGOROUS MIXING AND SHEARING ACTION AND (C) EXERTING A VIGOROUS MIXING AND SHEARING ACTION ON SAID MIXTURE THROUGHOUT SAID POLYMERIZATION PERIOD SUCH THAT (1) THE FORMATION OF A SOLIDIFIED MASS IS PREVENTED AND (2) SAID POLYMER IS IN A FINELY DIVIDED FORM UPON LEAVING SAID REACTION ZONE.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |