Patent US3565855A successfully refreshed from Google Patents.
US3565855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus-containing antioxidant in polyolefins
Assignee: Ethyl Corp
•
Filing: 1969-05-14
•
Granted: 1971-02-23
•
Expires: 1989-05-14
Abstract
Abstract DIHYDROCARBYLHYDRORXYPHENYL ARYL OR ALKYL PHOSPHONITES, PHOSPHONATES, PHOSPHATES, PHOSPHITES, PHOSPHINATES, PHOSPHINITES, PHOSPHOROTHIONATES, PHOSPHONOTHIONATES, AND PHOSPHINOTHIONATES ARE ANTIOXIDANTS. THE EFFECTIVENESS OF THESE ANTIOXIDANTS IS ENHANCED BY USE IN COMBINATION WITH A DIHYDROCARBYLTHIODIALKANOATE SUCH AS DILAURYLTHIODIPROPIONATE (DLTDP). THE STABILIZERS ARE ESPECIALLY USEFUL IN POLYPROPYLENE.
Inventors
- 👤 Bernard R Meltsner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:43
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/322; C08; C08K; C08K5/00; C08K5/49; C08K5/51
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |