Patent US3204014A successfully refreshed from Google Patents.
US3204014A
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Stabilization of polyacetals
Assignee: Tenneco Chemicals Inc
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Filing: 1962-09-20
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Granted: 1965-08-31
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Expires: 1982-09-20
Abstract
No abstract record available.
Inventors
- 👤 Green Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/36; C08K5/37; C08K5/372
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A THERMALLY STABLE PLYACETAL COMPOSITION COMPRISING A HIGH MOLECULAR WEIGHT POLYMER OF FORMALDEHYDE AND CONTAINING FROM ABOUT 0.1% TO ABOUT 10% BY WEIGHT OF A STABILIZER SYSTEM COMPRISING (A) A COPOLYMER RESULTING FROM THE POLYMERIZATION OF A MIXTURE OF 30% TO 90% BY WEIGHT OF N-VINYLPYRROLIDONE AND 10% TO 70% BY WEIGHT OF A MONOOLEFINIC MONOMER COPOLYMERIZABLE THEREWITH; (B) A PHENOLIC ANTIOXIDANT HAVING THE FORMULA
Claim 2
Dependent Claim
65 words
A THERMALLY STABLE PLYACETAL COMPOSITION COMPRISING A HIGH MOLECULAR WEIGHT POLYMER OF FORMALDEHYDE AND CONTAINING FROM ABOUT 0.1% TO ABOUT 10% BY WEIGHT OF A STABILIZER SYSTEM COMPRISING (A) A COPOLYMER RESULTING FROM THE POLYMERIZATION OF A MIXTURE OF 30% TO 90% BY WEIGHT OF N-VINYLPYRROLIDONE AND 10% TO 70% BY WEIGHT OF A MONOOLEFINIC MONOMER COPOLYMERIZABLE THEREWITH; (B) A PHENOLIC ANTIOXIDANT HAVING THE 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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |