Patent US3691132A successfully refreshed from Google Patents.
US3691132A
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Stabilizer system
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1966-11-16
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Granted: 1972-09-12
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Expires: 1986-11-16
Abstract
Abstract Polyolefins are stabilized with polyphosphites, polyphosphates, polyphosphonates, polyborates, polycarbonates, and polysilianes which are condensation products of a 4,4''-bisphenol with a condensing or linking agent which may be either ester-type, such as the esters of triaryl or mixed aryl-alkyl compounds, or the acid halide type having molecular weights between about 600 to 8,000 or higher.
Inventors
- 👤 Delos E Brown
- 👤 Norman P Neureiter
- 👤 Henry G Schutze
- 👤 Herschel C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:14
CPC Classifications
C; C07; C07C; C07C323/00; C07F; C07F5/00; C07F5/02; C07F5/04; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/28; C07F9/38; C07F9/40; C07F9/4071; C07F9/4084; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/11; C08K5/13; C08K5/134; C08K5/36; C08K5/37; C08K5/375; C08K5/49; C08K5/51; C08K5/54; C08K5/541; C08K5/5415; C08K5/5419
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
13 words
A composition of matter according to claim 1 wherein said polyolefin is polypropylene.
Claim 2
Dependent Claim
62 words
A composition of matter according to claim 1 where R'' is selected from the group consisting of C4 to C12 tertiary alkyls and C3 to C12 secondary alkyls; R'''' is hydrogen; R'''''' is selected from the group consisting of hydrogen and a C1 to C5 alkyl; and R'''''''' is selected from the group consisting of hydrogen and a C1 to C2 alkyl.
Claim 3
Dependent Claim
33 words
A composition of matter according to claim 1 where Y is and X is , where R is selected from the group consisting of hydrogen, a C1 to C8 alkyl and an aryl.
Claim 4
Dependent Claim
2 words
Z is
Claim 5
Dependent Claim
19 words
n has a value from 1 to 15 except when Y is and then n is 2 to 15.
Claim 6
Dependent Claim
30 words
A composition of matter according to claim 4 wherein said composition of matter having the structural formula is a mixture having an average molecular weight of between 600 and 8,000.
Claim 7
Dependent Claim
16 words
A composition of matter according to claim 4 wherein R'' is t-butyl and R'''''' is methyl.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |