Patent US4151211A successfully refreshed from Google Patents.
US4151211A
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US
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Bis-(phenolic)diacetals
Assignee: Borg Warner Corp
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Filing: 1978-03-06
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Granted: 1979-04-24
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Expires: 1998-03-06
Abstract
Abstract Phenolic acetals wherein the phenolic groups are hindered by ortho substituents. The acetals are prepared by the reaction of certain phenolic aldehydes with alcohols or mercaptans and are effective to impart thermal stability to olefin polymers.
Inventors
- 👤 Ingenuin Hechenbleikner
- 👤 William P. Enlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:01
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/10; C07C; C07C323/00; C07C41/00; C07C41/48; C07C41/50; C07C41/56; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
A phenolic acetal having the structural formula: ##STR6## wherein R and R' are lower alkyl groups and R 2 is an alkyl of 6-18 carbon atoms.
Claim 2
Dependent Claim
26 words
A phenolic acetal having the structural formula: ##STR6## wherein R and R' are lower alkyl groups and R 2 is an alkyl of 6-18 carbon atoms.
Claim 3
Dependent Claim
14 words
The phenolic acetal of claim 1 wherein R and R' are tertiary alkyl groups.
Claim 4
Dependent Claim
14 words
The phenolic acetal of claim 1 wherein R and R' are tertiary butyl groups.
Claim 5
Dependent Claim
16 words
The phenolic acetal of claim 1 having the structural formula (B) wherein R 2 is dodecyl.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |