US2993025A
Expired / Lapsed
US
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Polyoxymethylene compositions stabilized with a synthetic superpolyamide
Assignee: EIDP Inc
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Filing: 1958-06-02
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Granted: 1961-07-18
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Expires: 1978-06-02
Abstract
No abstract record available.
Inventors
- 👤 Alsup Richard Glenn
- 👤 Lindvig Philip Ervin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/02; C08L59/00; C08L59/02; Y; Y10; Y10S; Y10S525/00; Y10S525/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A NORMALLY SOLID COMPOSITION OF MATTER COMPRISING A MIXTURE OF POLYOXYMETHYLENE AND 0.001% OF 50% BY WEIGHT OF A SUPERPOLYAMIDE UNIFORMLY DISTRIBUTED THROUGHOUT SAID POLYOXYMETHYLENE, THE SAID POLYOXYMETHLENE BEING AN ADDITION POLYMER OF FORMALDEHYDE IN WHICH THE POLYMER CHAIN, EXCLUSIVE OF THE TERMINAL PORTIONS OF THE CHAIN, IS A SERIES OF METHYLENE-TO-OXYGEN LINKAGES OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
57 words
A NORMALLY SOLID COMPOSITION OF MATTER COMPRISING A MIXTURE OF POLYOXYMETHYLENE AND 0.001% OF 50% BY WEIGHT OF A SUPERPOLYAMIDE UNIFORMLY DISTRIBUTED THROUGHOUT SAID POLYOXYMETHYLENE, THE SAID POLYOXYMETHLENE BEING AN ADDITION POLYMER OF FORMALDEHYDE IN WHICH THE POLYMER CHAIN, EXCLUSIVE OF THE TERMINAL PORTIONS OF THE CHAIN, IS A SERIES OF METHYLENE-TO-OXYGEN LINKAGES OF THE GENERAL FORMULA:
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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |