US3281392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyoxymethylene compositions stabilized with pyrimidine derivatives
Assignee: Montedison SpA
•
Filing: 1963-06-07
•
Granted: 1966-10-25
•
Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
- 👤 Oddo Nino
- 👤 Porra Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:22
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3462
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A THERMALLY STABLE POLYMERIC COMPOSITION CONSISTING ESSENTIALLY OF A HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE CONTAINING RECURRING -CHH2O- UNITS AND APPROXIMATELY 0.01 TO 10% BY WEIGHT OF THE POLYOXYMETHYLENE OF A PYIMIDINE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
42 words
A THERMALLY STABLE POLYMERIC COMPOSITION CONSISTING ESSENTIALLY OF A HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE CONTAINING RECURRING -CHH2O- UNITS AND APPROXIMATELY 0.01 TO 10% BY WEIGHT OF THE POLYOXYMETHYLENE OF A PYIMIDINE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 3
Dependent Claim
42 words
THE POLYMERIC COMPOSITION OF CLAIM 1 WHEREIN THE HIGH MOLECULAR WEIGHT POLYOXYMETHYLENE HAS AN INHERENT VISCOSITY BEING IN EXCESS OF 0.3; SAID INHERENT VISCOSITY DETERMINED FROM A SOLUTION OF DIMETHYLFORMAMIDE COMTAINING 0.5% BY WEIGHT OF THE POLYMER AT A TEMPERATURE OF 150*C.
Claim 4
Dependent Claim
27 words
THE POLYMERIC COMPOSITION OF CLAIM 2 WHEREIN THE COMPOSITION CONTAINS 0.01 TO 5.0% BY WEIGHT OF AN ANTIOXIDANT SELECTED FROM THE GROUP CONSISTIG OF DIPHEYLAMINE AND 4,4''-BUTYLIDENE-BIS-(6-TERT.BUTYL-3-METHYLPHENOL).
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |