Patent US4433847A successfully refreshed from Google Patents.
US4514533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hindered phenolic norbornane-2,3-dicarboximides and stabilized compositions
Assignee: Canusa Coating Systems Ltd
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Filing: 1983-09-27
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Granted: 1985-04-30
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Expires: 2003-09-27
Abstract
Abstract ##STR1## where X is 1, 2 or 3; Y is Cl or Br; R 1 is tert-butyl (t-butyl) and R 2 is H or lower alkyl of 1 to 4 carbons. The preferred group of compounds is where OH is at the 4 position, R 1 is at the 3 position and R 2 is at the 5 position of the phenyl ring. The most preferred compound is where X is 2, R 1 and R 2 are both t-butyl at the 3 and 5 positions of the phenyl ring and OH is at the 4 position of the phenyl ring and Y is Cl. The compounds are useful as antioxidants and flame retardants.
Inventors
- 👤 Ralph H. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K5/3417; C07; C07D; C07D209/00; C07D209/56; C07D209/58; C07D209/72; C07D209/76; Y; Y10; Y10S; Y10S264/00; Y10S264/71
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
37 words
The compound of the formula I ##STR3## where X is 1, 2 or 3; Y is Cl or Br; R 1 is tert-butyl (t-butyl) and R 2 is H or lower alkyl of 1 to 4 carbons.
Claim 2
Dependent Claim
37 words
The compound of the formula I ##STR3## where X is 1, 2 or 3; Y is Cl or Br; R 1 is tert-butyl (t-butyl) and R 2 is H or lower alkyl of 1 to 4 carbons.
Claim 3
Dependent Claim
31 words
The compound of claim 1 where OH is at the 4 position, R 1 is at the 3 position and R 2 is at the 5 position of the phenyl ring.
Claim 4
Dependent Claim
13 words
A composition comprising a polymer and the compound of claim 1 or 2.
Claim 5
Dependent Claim
14 words
A composition comprising a polyolefin polymer and the compound of claim 1 or 2.
Claim 6
Dependent Claim
13 words
A heat shrinkable product comprising a polymer and the compound of claim 1.
Claim 7
Dependent Claim
27 words
The composition of claim 3 in which the amount of the compound of formula (I) is about 0.05 to 150% based on the weight of the polymer.
Claim 8
Dependent Claim
16 words
A heat shrinkable product comprising polyethylene crosslinked with vinyl trimethoxysilane and the compound of formula I.
Claim 9
Dependent Claim
16 words
A heat shrinkable product comprising polyethylene crosslinked with vinyl trimethoxysilane and the compound of formula I.
Claim 10
Dependent Claim
8 words
The compound ##STR4## where each y is chlorine.
Claim 11
Dependent Claim
8 words
The compound ##STR4## where each y is chlorine.
Claim 12
Dependent Claim
11 words
A composition comprising the compound of claim 8 in a polymer.
Claim 13
Dependent Claim
13 words
A composition comprising the compound of claim 8 in a heat shrinkable polymer.
Claim 14
Dependent Claim
11 words
The composition of claim 9 which the polymer is a polyolefin.
Claim 15
Dependent Claim
13 words
The composition of claim 11 in which the polyolefin is polyethylene or polypropylene.
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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) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |