US3240753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxymethylene polymers stabilized with alkylene bisphenols
Assignee: Celanese Corp
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Filing: 1965-04-20
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Granted: 1966-03-15
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Expires: 1985-04-20
Abstract
No abstract record available.
Inventors
- 👤 Dolce Thomas Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:29
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A STABILIZED POLYMER COMPOSITION COMPRISING A MOLDABLE OXYMETHYLKENE-CYCLIC ETHER COPOLYMER CONTAINING FROM 60 TO 99.6 MOL PERCENT OF RECURRING OXYMETHYLENE UNITES, SAID CYCLIC ETHER HAVING AT LEAST TWO ADJACENT CARBON ATOMS, AND A STABILIZING AMOUNT OF AN ALKYLENE BISPHENOL SELECTED FROM THE GROUP CONSISTING OF 2,2''-ALKYLENE-BIS(4,6-DIALKYL PHENOL) AND 4,4''-ALKYLENE-BIS(2,6-DIALKYL PHENOL), SAID ALKYLENE BISPHENOL HAVING FROM 1 TO 4 CARBON ATOMS IN ITS ALKYLENE GROUP AND IN EACH OF ITS ALKYL GROUPS.
Claim 2
Dependent Claim
71 words
A STABILIZED POLYMER COMPOSITION COMPRISING A MOLDABLE OXYMETHYLKENE-CYCLIC ETHER COPOLYMER CONTAINING FROM 60 TO 99.6 MOL PERCENT OF RECURRING OXYMETHYLENE UNITES, SAID CYCLIC ETHER HAVING AT LEAST TWO ADJACENT CARBON ATOMS, AND A STABILIZING AMOUNT OF AN ALKYLENE BISPHENOL SELECTED FROM THE GROUP CONSISTING OF 2,2''-ALKYLENE-BIS(4,6-DIALKYL PHENOL) AND 4,4''-ALKYLENE-BIS(2,6-DIALKYL PHENOL), SAID ALKYLENE BISPHENOL HAVING FROM 1 TO 4 CARBON ATOMS IN ITS ALKYLENE GROUP AND IN EACH OF ITS ALKYL GROUPS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |