Patent US2997455A successfully refreshed from Google Patents.
US2997455A
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Process of stabilizing polyolefins, and product
Assignee: Huels AG
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Filing: 1957-10-25
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Granted: 1961-08-22
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Expires: 1977-10-25
Abstract
No abstract record available.
Inventors
- 👤 Broich Franz
- 👤 Steinbrink Hans
- 👤 Frese Albert
- 👤 Konig Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:46
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/04; C08L23/06; C08L23/18; C08L23/20; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
PROCESS FOR THE STABILIZATION OF A POLYOLEFIN OF THE GROUP CONSISTING OF POLYETHYLENES, POLYPROPYLENES AND POLYBUTYLENES WHICH COMPRISES ADDING THERETO FROM 0.01% TO 1% BY WEIGHT OF A CONDENSATION PRODUCT OF A PHENOL OF THE GROUP CONSISTING OF THE O- AND P-ALKYL PHENOLS AND THE 2,4-DIALKYLPHENOLS IN WHICH THE ALKYL GROUPS CONTAIN FROM 1 TO 8 CARBON ATOMS, FORMALDEHYDE AND A SECONDARY AMINE OF THE GROUP CONSISTING OF THE DI-LOWER ALKYL AMINES, MORPHOLINE, PIPERAZINE AND PIPERIDINE, SAID CONDENSATION PRODUCT HAVING THE FORMULA
Claim 2
Dependent Claim
82 words
PROCESS FOR THE STABILIZATION OF A POLYOLEFIN OF THE GROUP CONSISTING OF POLYETHYLENES, POLYPROPYLENES AND POLYBUTYLENES WHICH COMPRISES ADDING THERETO FROM 0.01% TO 1% BY WEIGHT OF A CONDENSATION PRODUCT OF A PHENOL OF THE GROUP CONSISTING OF THE O- AND P-ALKYL PHENOLS AND THE 2,4-DIALKYLPHENOLS IN WHICH THE ALKYL GROUPS CONTAIN FROM 1 TO 8 CARBON ATOMS, FORMALDEHYDE AND A SECONDARY AMINE OF THE GROUP CONSISTING OF THE DI-LOWER ALKYL AMINES, MORPHOLINE, PIPERAZINE AND PIPERIDINE, SAID CONDENSATION PRODUCT 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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |