US3249582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic amine stabilized polyacetals
Assignee: Hoechst AG
•
Filing: 1962-03-06
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Granted: 1966-05-03
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Expires: 1982-03-06
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Heinz
- 👤 Roos Gunther
- 👤 Mauz Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A COMPOSITION OF MATTER COMPRISING A MACROMOLECULAR POLYOXYALKYLENE POLYMER HAVING RECURRING -CH(-R1)-OGROUPS WHEREIN R1 STANDS FOR HYDROGEN OR ALKYL OF UP TO FOUR CARBON ATOMS, SAID POLYMER BEING STABILIZED AGAINST DECOMPOSITION UPON EXPOSURE TO HEAT AND OXIDATION BY 0.1 TO 10% BY WEIGHT OF A STABILIZER HAVING THE FORMUAL AR-CH=N-R OR AR-CH=N-PHENYLENE-N=CH-AR WHEREIN AR IS PHENYL, HYDROXY PHENYL OR HYDROXY NAPHTHYL AND R IS PHENYL, HYDROXY PHENYL, LOWER ALKYL PHENYL, DIPHENYL, AN ALIPHATIC HYDROCARBON GROUP OF 2 TO 18 CARBON ATOMS OR A CYCLOALIPHATIC HYDROCARBON GROUP OF 5 TO 10 CARBON ATOMS.
Claim 2
Dependent Claim
92 words
A COMPOSITION OF MATTER COMPRISING A MACROMOLECULAR POLYOXYALKYLENE POLYMER HAVING RECURRING -CH(-R1)-OGROUPS WHEREIN R1 STANDS FOR HYDROGEN OR ALKYL OF UP TO FOUR CARBON ATOMS, SAID POLYMER BEING STABILIZED AGAINST DECOMPOSITION UPON EXPOSURE TO HEAT AND OXIDATION BY 0.1 TO 10% BY WEIGHT OF A STABILIZER HAVING THE FORMUAL AR-CH=N-R OR AR-CH=N-PHENYLENE-N=CH-AR WHEREIN AR IS PHENYL, HYDROXY PHENYL OR HYDROXY NAPHTHYL AND R IS PHENYL, HYDROXY PHENYL, LOWER ALKYL PHENYL, DIPHENYL, AN ALIPHATIC HYDROCARBON GROUP OF 2 TO 18 CARBON ATOMS OR A CYCLOALIPHATIC HYDROCARBON GROUP OF 5 TO 10 CARBON ATOMS.
References Cited (Backward Citations)
US2376354A
Cited
US3041165A
Cited
US2886601A
Cited
US2966476A
Cited
US3055815A
Cited
US2951832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |