Patent US3288885A successfully refreshed from Google Patents.
US3288885A
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Composition for stabilizing polyacetals comprising (1) nu-acyl-p-aminophenol, (2) a superpolyamide, and (3) a diester of a thiodialkanoic acid
Assignee: Tenneco Chemicals Inc
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Filing: 1963-04-04
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Granted: 1966-11-29
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Expires: 1983-04-04
Abstract
No abstract record available.
Inventors
- 👤 Green Richard
- 👤 Roy T Gottesman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:02
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C08K5/36; C08K5/37; C08K5/372; C08L; C08L59/00; C08L59/02; C08L77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A THERMALLY STABLE POLYACETAL COMPOSITION COMPRISING A HIGH MOLECULAR WEIGHT POLYMER OF FORMALDEHYDE HAVING A MOLECULAR WEIGHT IN THE RANGE FROM ABUT 10,000 TO ABOUT 200,000 AND A MELTING POINT IN EXCESS OF 170*C. AND CONTAINING A STABILIZER SYSTEM COMPRISING (I) FROM ABOUT 0.001 TO ABOUT 10 PERCENT BY WEIGHT OF AN N-ACYL-P-AMINOPHENOL IN WHICH THE ACRYL GROUP CONTAINS FROM 2 TO 20 CARBON ATOMS, (II) FROM ABOUT 0.01 TO ABOUT 50 PERCENT BY WEIGHT OF A SUPERPOLYAMIDE FORMED UPON THE POLYMERIZATION OF MONOMERIC COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF MIXTURE OF DICARBOXYLIC ACIDS AND DIAMINES, AND 2-AMINOMONOCARBOXYLIC ACIDS, AND HAVING A DEGREE OF POLYMERIZATION IN THE RANGE BETWEEN ABOUT 100 TO ABOUT 200, AND (III) FROM ABOUT 0.0001 TO ABOUT 1 PERCENT BY WEIGHT OF A DIESETER OF A THIODIALKANOIC ACID HAVING A STRUCTURE REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
140 words
A THERMALLY STABLE POLYACETAL COMPOSITION COMPRISING A HIGH MOLECULAR WEIGHT POLYMER OF FORMALDEHYDE HAVING A MOLECULAR WEIGHT IN THE RANGE FROM ABUT 10,000 TO ABOUT 200,000 AND A MELTING POINT IN EXCESS OF 170*C. AND CONTAINING A STABILIZER SYSTEM COMPRISING (I) FROM ABOUT 0.001 TO ABOUT 10 PERCENT BY WEIGHT OF AN N-ACYL-P-AMINOPHENOL IN WHICH THE ACRYL GROUP CONTAINS FROM 2 TO 20 CARBON ATOMS, (II) FROM ABOUT 0.01 TO ABOUT 50 PERCENT BY WEIGHT OF A SUPERPOLYAMIDE FORMED UPON THE POLYMERIZATION OF MONOMERIC COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF MIXTURE OF DICARBOXYLIC ACIDS AND DIAMINES, AND 2-AMINOMONOCARBOXYLIC ACIDS, AND HAVING A DEGREE OF POLYMERIZATION IN THE RANGE BETWEEN ABOUT 100 TO ABOUT 200, AND (III) FROM ABOUT 0.0001 TO ABOUT 1 PERCENT BY WEIGHT OF A DIESETER OF A THIODIALKANOIC ACID HAVING A STRUCTURE REPRESENTED BY 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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |