US2795571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic process for polymerizing trioxane to tough, high molecular weight polyoxymethylene
Assignee: EIDP Inc
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Filing: 1956-04-17
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Granted: 1957-06-11
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Expires: 1976-04-17
Abstract
No abstract record available.
Inventors
- 👤 Allan K Schneider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:26
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PREPARING TTOUGH, HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE CAPABLE OF BEING ORIENTED AND MOLDED, WHICH COMPRISES POLYMERIZING TRIOXANE AS THE SOLE REACTANT, UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE BETWEEN ROOM TEMPERATURE AND 170* C., AND IN CONTACT WITH A CATALYST CONSISTING OF AN INORGANIC FLUORIDE SELECTED FROM THE CLASS CONSISTING OF ANTIMONY TRIFLUORIDE, ANTIMONY FLUOBORATE, BISMUTH TRIFLUORIDE, BISMUTH OXYFLUORIDE, NICKELOUS FLUORIDE, ALUMINUM TRIFLUORIDE, TITANIUM TETRAFLUORIDE, MANGANOUS FLUORIDE, MANGANIC FLUORIDE, MERCURIC FLUORIDE, SLIVER FLUORIDE, ZINC FLUORIDE, AMMONIUM BIFLUORIDE, PHOSPHORUS PENTAFOUORIDE, HYDROGEN FLUORIDE, AND FLUOSULFONIC ACID.
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING TTOUGH, HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE CAPABLE OF BEING ORIENTED AND MOLDED, WHICH COMPRISES POLYMERIZING TRIOXANE AS THE SOLE REACTANT, UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE BETWEEN ROOM TEMPERATURE AND 170* C., AND IN CONTACT WITH A CATALYST CONSISTING OF AN INORGANIC FLUORIDE SELECTED FROM THE CLASS CONSISTING OF ANTIMONY TRIFLUORIDE, ANTIMONY FLUOBORATE, BISMUTH TRIFLUORIDE, BISMUTH OXYFLUORIDE, NICKELOUS FLUORIDE, ALUMINUM TRIFLUORIDE, TITANIUM TETRAFLUORIDE, MANGANOUS FLUORIDE, MANGANIC FLUORIDE, MERCURIC FLUORIDE, SLIVER FLUORIDE, ZINC FLUORIDE, AMMONIUM BIFLUORIDE, PHOSPHORUS PENTAFOUORIDE, HYDROGEN FLUORIDE, AND FLUOSULFONIC ACID.
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) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |