Patent US3156669A successfully refreshed from Google Patents.
US3156669A
Expired / Lapsed
US
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Thermal stabilization of oxymethylene polymers by the use of maleurate esters
Assignee: Celanese Corp
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Filing: 1960-01-27
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Granted: 1964-11-10
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Expires: 1980-01-27
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Kray
- 👤 Thomas J Dolce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:52
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/21
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
39 words
A POLYMER COMPOSITION COMPRISING A MOLDABLE OXYMETHYLENE POLYMER AND A STABILIZING AMOUNT OF A MALEURATE MONOESTER, SAID OXYMETHYLENE POLYMER CONTAINING OXYALKYLENE GROUPS HAVING MORE THAN ONE CARBON ATOM AND CONTAINING FROM 60 TO 99.6 MOL PERCENT OF OXYMETHYLENE GROUPS.
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |