US3210322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of oxymethylene polymerization product
Assignee: Celanese Corp
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Filing: 1961-02-09
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Granted: 1965-10-05
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Expires: 1981-02-09
Abstract
No abstract record available.
Inventors
- 👤 Jr George Wayne Polly
- 👤 Heinz Walter Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:32
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/10; C08G2/18; C08G2/28; C08G2/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
METHOD FOR TREATING A TRIOXANE POLYMERIZATION PRODUCT CONPRISING A HIGH MOLECULAR WEIGHT OXYMETHYLENE POLYMER, A TRIOXANE POLYMERIZATION CATALYST AND UNREACTED TRIOXANE WHICH CONSISTS ESSENTIALLY OF LOOSELY BLENDING SAID POLYMERIZATION PRODUCT IN SOLID CONDITION WITH A FINELY DIVIDE THERMAL STABILIZER FOR OXYMETHYLENE POLYMERS AND THEREAFTER MAINTAINING SAID BLEND IN CONTACT WITH A DRYING GAS AT AN ELEVATED TEMPERATURE OF 115170*C., FOR A PERIOD SUFFICIENT TO VOLATILIZE SUBSTANTIALLY ALL OF SAID UNREACTED TRIOXANE, SAID PERIOD BEING IN RANGE OF 5 MINUTES TO 8 HOURS.
Claim 2
Dependent Claim
82 words
METHOD FOR TREATING A TRIOXANE POLYMERIZATION PRODUCT CONPRISING A HIGH MOLECULAR WEIGHT OXYMETHYLENE POLYMER, A TRIOXANE POLYMERIZATION CATALYST AND UNREACTED TRIOXANE WHICH CONSISTS ESSENTIALLY OF LOOSELY BLENDING SAID POLYMERIZATION PRODUCT IN SOLID CONDITION WITH A FINELY DIVIDE THERMAL STABILIZER FOR OXYMETHYLENE POLYMERS AND THEREAFTER MAINTAINING SAID BLEND IN CONTACT WITH A DRYING GAS AT AN ELEVATED TEMPERATURE OF 115170*C., FOR A PERIOD SUFFICIENT TO VOLATILIZE SUBSTANTIALLY ALL OF SAID UNREACTED TRIOXANE, SAID PERIOD BEING IN RANGE OF 5 MINUTES TO 8 HOURS.
Claim 3
Dependent Claim
13 words
THE METHOD OF CLAIM 1, WHEREIN SAID THERMAL STABILIZER COMPRISES A PHENOLIC ANTI-OXIDANT.
References Cited (Backward Citations)
US2568018A
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US2795571A
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FR1216327A
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US2989509A
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US2982758A
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US3001235A
Cited
US3103499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |