US3244672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha, beta-unsaturated ether stabilized polyoxymethylenes and a process for preparing the same
Assignee: Hoechst AG
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Filing: 1961-03-03
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Granted: 1966-04-05
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
- 👤 Hermann Hans Dieter
- 👤 Weissermel Klaus
- 👤 Fischer Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:38
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/30; C08G2/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A PROCESS FOR STABILIZING POLYOXYMETHYLEN WHICH COMPRISES REACTING ONE PART OF A POLYOXYMETHYLEN EDECOMPOSING AT 220*C. WITHIN 30 MINUTES UNDER NITROGEN TO LESS THAN 80% WITH 0.001 TO 10 PARTS BY WEIGHT OF AN A,B-UNSATURATED ETHER SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
46 words
A PROCESS FOR STABILIZING POLYOXYMETHYLEN WHICH COMPRISES REACTING ONE PART OF A POLYOXYMETHYLEN EDECOMPOSING AT 220*C. WITHIN 30 MINUTES UNDER NITROGEN TO LESS THAN 80% WITH 0.001 TO 10 PARTS BY WEIGHT OF AN A,B-UNSATURATED ETHER SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
Claim 3
Dependent Claim
43 words
A STABILIZED POLYOXYMETHYLENE WHICH IS THE REACTION PRODUCT OF A POLYOXYMETHYLENE WHICH DECOMPOSES AT 220* C. WITHIN 30 MINUTRES UNDER NITROGEN TO LESS THAN 80% HAVING TERMINAL HYDROXYL GROUPS AND AN A,B-UNSATURATED ETHER SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
Claim 4
Dependent Claim
43 words
A STABILIZED POLYOXYMETHYLENE WHICH IS THE REACTION PRODUCT OF A POLYOXYMETHYLENE WHICH DECOMPOSES AT 220* C. WITHIN 30 MINUTRES UNDER NITROGEN TO LESS THAN 80% HAVING TERMINAL HYDROXYL GROUPS AND AN A,B-UNSATURATED ETHER SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
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US2296249A
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US2962476A
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US2989508A
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GB848660A
Cited
US3087913A
Cited
US3002952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |